come on azari - their are no shortage of xenophobes in all nations, ranting on about the evil other... i can go to any web forum in any country and come across ultra nationalist types full of bile.
your not going to tell me all the arab/iranian/muslim ranters are a jewish conspiracy are you.
i dont think you can draw a strict cause and effect between them and psycho killing - somewhere in it all is a line between grumpy opinion and being a ruthless killer... there are things i hate, things i will say i hate.. but they arent things i will kill someone over, just things i reject for myself.
it will be an even more twisted and authoritarian west if people start getting rounded up for being prejudiced assholes (by someones definition).. in my country we have conservative muslim preachers get in trouble for not being very different to spengler and the bulk of us did not agree with them being punished for it and they got off.
eg:
http://en.wikipedia.org/wiki/Taj_El-Din_Hilaly" onclick="window.open(this.href);return false;
hes been in trouble for breaking the law (smuggling and unlicensed vehicles) but never for being a grumpy sexist xenophobe, despite the fact several groups (feminists and jews) wish him to be... do you really want to open this pandoras box.