There’s tons of people like the ones you’re referring to that will never change their minds no matter if you’re polite or a jerk, mature or immature. But the people who might change their mind are much less likely to listen to someone who talks like that. I know this because just a few years ago that was me. I was one of those “I want common sense gun laws” people until my mind was changed by people getting their point across in a mature, factually sourced manner and now I’m about as pro gun as you can get and I don’t even own a gun.
I simply want as many people as possible on our side. If we convince enough people then the media will be forced to stop with their bulkshit labeling and lies