Islam is a political ideology as much as it is a religion, if you believe in Islam and apply it you get the shariah and the sunnah which shape every part of the society. You can't treat it differently from any other political ideology. It's nothing like the 2 other monotheistic religions.

" The realm of political ideology in a democracy however mostly concerns you and your worldview, which you can change. "

How is that different from a religion? I don't get your point.

" I consider citizens of a democracy responsible for their worldview and they can be called into account for it's internal consistency. "

Just as anyone else? Why would a religion be exempt of that when it shapes a huge part of someone's worldview?

" There are people calling themselves Christians without really believing in God. Hell I'm celebrating Christmas every year. "

And antifas act like fascists, people from the left-wing vote for right-winged economical decrees, right-winged vote for left-winged social decrees, etc...

"you won't get banned"

Yes I did get banned from r/Europe for that arguing against multiculturalism/cosmopolitanism and mass-immigration using studies highlighting racial predispositions. I don't know about this sub in particular but I assume they'd conform to reddit's policy guidelines.