I guess you're as prejudiced as a regular skinhead. Claiming that 'Europe (especially Poland and Russia) is the infamous capital of violent crimes committed by skinheads and neonazis against non-Slav immigrants' is a prejudiced point of view. Can you provide any statistics supporting your statement?
Choosing to believe stereotypes shows your own biases.
My post won't be nice but I hope it will open your eyes.
As for Neo-Nazismm it exist all over the world and when you google 'neo nazi crimes in europe' most links give you information about Germany (your home country, I believe) and actual racial murders rather than hooliganism. If I were really mean I would ask about WW2 and why so many believed that outrageous maniac and followed his orders killing Jews, Slavs, Gypsies, gays and the disabled on a mass scale.
So now you live in the US, the home of the KKK and the Aryan Brotherhood - yeah, they're very tolerant.
Now you're gonna claim I'm being prejudiced and only a small percentage of Americans act like this but the same applies to other countries so why point to two of them or to one continent only?
And what scares me is that you want to hunt neonazis as a sport, which basically says a lot about you as a person. You're not that different from them, you know.