Warning: I accidentally typed too much, probably not worth your time. Serious its extreme and I write at a third grade level, but dammit I'm not typing for the exercise and I wasted an unreasonable amount of time so I'm submitting it.
None of those things count as an argument that people would like Trump, other than that those opinions are common in Trump's base. That's a byproduct of the "us vs them" mentality that's at the source of all this. The number one offender is on your list. I think political correctness is "destroying civilization", but not for the same reasons I think most Trump supporters do. They just want to be able to be racist openly like the good old days. I think people give words power and we should never give in to that power. Curse words lose their bite when you curse like a sailor, the same can be said for anything other spoken word. Our every day speech is full of words that have lost racist connotations. We should judge a man on the hate behind his words not the hate inherent on a word itself. Blaming the words obfuscates the actual intent of the person who spoke them and is used on both sides to get away with character murder. And, perhaps more importantly, I honestly think it hinders useful conversation on nearly any social topic, such as the ones you brought up, misogyny and immigration.
I used to think like all those (mostly) young, white men that mostly fit the group of posters you are talking about. You end up in a situation where you do support things like immigration, healthcare and taking care of everyone. You want to show your support. Yet you also realize people living in shitty refugee housing with a family to support will drive some to desperation. Its not a race thing, if your family was chased out of your country and you didn't have enough to feed your family and no one wanted to hire you, you might end up trying to steal or your young son, angry at being driven from home and not old enough to understand that you just wanted to protect him and his little sister, might turn to vandalism or theft himself. You try to bring this up, but get called a racist.
There is no conversation, no grey area. Are you for immigration or against it? For, you say, you just realize there are more issues involved than just letting them in or not. Turmoil follows major disruptions, its just a fact of life that needs to be planned for. White men don't get it, you're told, they never had to fight for anything. And if you dare ask for someone to explain to you then, you're laughed off.
I used to hear that a lot when I worked in a college environment that was pretty "feminist" heavy. It used to really piss me off. My mom raised me alone with the help of her 5 sisters. My dad brought nothing but shit into my childhood. Out of 21 cousins I have on my mom's side, only 4 of us are male. I have been surrounded by loving women my entire life. To be told I didn't understand the plight of a woman because I was a man, when all I'd ever seen my entire life was my mom going through the shit for me, was INFURIATING. And at some point, after working in that environment for several years, I realized it had started to change me into what they said I was. I was getting misogynistic. It crept in over time in the form of anger, reinforced shame and denial of an opinion. I didn't hate women, but the people making me feel impotent and undeserving were women that hated men. When given the choice of the two teams, it just seemed to make sense. It wasn't a conscious choice, and once I saw it in myself I was able to let go of that anger and realize these were just shallow, hateful little women and they didn't actually represent their gender any more than the misogynists they claimed represented mine. There weren't just two teams as long as you didn't give a shit about the game.
Most of reddit feels like it is being denied an opinion and have formed opinions that clash with their inherent liberalness. They think PC is robbing them of an opinion and its turning them hateful. We are being denied the categories of "for, but...". When forced to choose between "Cure cancer, but everyone named Ted is going to be stabbed to death" or "Dont cure cancer". And either way a group will call you a murderer, and I think we're just seeing backlash to that.
Personally, I still think that way but it isn't worth giving them the power to make me hate or be angry. I'll just talk like I want to be talked to, up front and honest and hope that I'm a good enough man that my opinions show me to be a stand up guy. If they don't hopefully someone will educate me instead of lumping me in with the racists or misogynists. Which if you think about it the most liberal camps use in the same fashion the ultra right use slurs, to marginalize and remove the humanity behind those their opinions are against rather than talking about the intent behind the words. Honestly, I think the extreme liberals have done a lot better at making young white men feel marginalized than they understand, but all they've done is empower that group with the same hate they themselves feel. Then they are told if they want to fight back, they can join either team feminist or team misogyny. Its kind of sad really. The internet is both a gift and a curse to discussions that fall in the grey area, but in this case its definitely a negative.
Sorry this turned into a whole, huge post but I've been trying to figure out why I'm so uncomfortable with most of reddit while agreeing with them on just about everything. Its the hate. I still get frustrated and angry about the topics and I agree with most of their base assertions, but the real loathing and bitterness that drives the extremes isn't there any more. I think what we're seeing is the transition between teen angst and anger, into more worldly adults in some kind of awkward, super public, group mental puberty. The same group that is trying to decide if they still hate the system too much to go vote or if they are feeling the Bern. Late teens, early twenties. When the only people who cared about politics were super fanatical and unreasonably black and white in their opinions, or pretty much out of some weird revenge? Welcome to most of reddit. Shit, when I joined reddit I was that part of reddit. On my worst days, I probably relapse into that part of reddit and feel like a total loser for a week. Welcome to growing up on the internet, I guess.
tl;dr PC correctness is destroying civilization. Muslims and immigrants are probably not destroying everything, BUT... and I totally understand extreme misogyny. I'm totally feeling the Bern and apparently incapable of giving a short concise opinion.