People on this forum fraternize closely. In fact, you and I fraternize closely. You call me bro. I call you bro. If you fraternize closely with a deviant believer or an apostate, you violate halacha. This is the Torah Law for Gentiles. The Torah Law for Jews is more restrictive.
Jews are commanded to compel others to act in the correct way. There is no way to change that.
Bro is like buddy I say that. Maybe if there's a crew to handle a problem, fine you get into the inner circle but like a bunch of them here are useful enough to be on the squad. Sometimes I feel like an old dude hanging out with buddies moaning about woes with the convos, but most are highly functional, we didn't create a bad thing here, ask a Rabbi.
Look at how Abraham went about it. He'd give people everything and treat them like kings without knowing a thing about them, which would definitely include not like bringing up that right away like "hey nice hat your idol sucks", then at the end he'd be like "thank G-d for what you received" and one guy would be like "the tree?" and he'd be like "c'mon bro you're way more awesome then a tree that's just funny Hashem is this..." but like he'd make the proper context and say it with the correct politeness and just would get them to keep the 7 and go on their way and live well and stop sacrificing their kids and stuff. Like if you save a city of faggots on accident like that time don't take their crap and don't talk to them, but they're like everyone from the nations have always been. These aren't malicious monsters looking to do damage, I was there, you really wanna be nice, and like from your point of view as a Catholic or whatever all the other religions are doing a bunch of crazy garbage you see is wrong, and like there's a section on Jews in your book that ensures you won't think twice and you're like yeah clearly I'm the right one, and you go around trying to be nice and nervously use apologetic or manipulation if you debate with atheists or other religions and they point out a hitch, that's like the worst thing they'll do other than these new missionaries that hunt little kids in parks. They want to be good and do what's right, yeah you have to know their religion says to convert people to their religion so they'll try to do that, but that is at worst annoying to anyone who knows anything about Torah, I can learn more in a sentence with Rashi than three years of "bible study". Like if you compile the total sum of my knowledge of all the Xtian groups I was in and studied from the height of orthodoxy with jesuits to mormons, I have double the functional information in a week of yeshiva, how can you possibly be scared of their words?
Maybe in Serbia it's different and you'll get knocked out if they know your religious beliefs, I have no idea, not trying to judge you, I'm just saying put on a bit of empathy for a second and talk to the people that muslims are trying to hunt and kill same as you with a normal level of respect, you can't blame them for what they believe, they don't have what you have. If all you gained from all the knowledge Torah is giving you to perfect yourself is that you can denigrate those that know less better, it didn't make you a tzadik, you became a rasha.
I'm obligated to tell my brother something if he did it, so for a Jew I have 613 to inform him nicely and properly if he missed [to help him up and not put him down at all] and for a Noachide I have 7. I am accomplishing something when I do that, and if I miss something, I am so happy that someone tells me, I want to be good but I am not all knowing or of 100% flawless midot. What are you hoping to gain by saying "hey u suck brah"? You want them to leave here? Just want to have an organized Noachide vs them debate B.I.R.T. you rock and they don't?
If you're trying to be like a tricky missionary and guilt them into it or whatever, I've seen it plenty, and would be interesting to watch it being done to them after the countless times I see it by them, but like do it like they do all fake nice and stuff so it's funny, what you said, all I can say is you don't need to lose your sense of humor to find Hashem.