Like to their face with their reactions realizing they are the fucked up asshole preaching to the opposite of the choir

I knew of this one guy who got shot in the neck while spouting off some thinly veiled racist crap about gun crime. I think his name was Charles.

"We are a totally peacefull, racist group"

Sadly there aren't many, if any really, because reality isn't about grandstanding or catchy sound bites.
Also, belief isn't so easily vanquished...

I mean, I know I'd like to have some at hand as well, but they will most likely be ignored even so.

Haters wanna hate, trolls wanna troll and i don't know how to enlighten them without.. violence.
It's not uncommon to just give up on trying to make them decent human beings (because that is obviously a Jewish globalist conspiracy to eradicate the 'white race' and western culture.. duh).

This happens every time they debate somebody with above room temperature intelligence. The problem is that they don't really care, because it was never about rational arguments and ideas for them. And also the fact that they have no shame of course.

Yes, they work their way backwards from their racist ideology to reach a conclusion

realizing they are the fucked up asshole

That's not what happens. First, they attack your views. Then, they attack your sources. Then, they attack your logic. Next, they attack you.

Finally, after attacking you sufficiently, they haughtily proclaim they don't have the time, you're not worth talking to, you're not qualified to have an opinion, you're not trying to have a discussion, you just want to spread lies, or whatever excuse they want to make as to why they don't have to listen to you, then storm off, insulting you loudly until they're out of earshot.