Look Amberience, you're right - I feel 006's comment might have been a little harsh and perhaps he assumed too much, so yeah, you were entitled to be taken aback.
HOWEVER...
You were not entitled to accuse him of having Down's syndrome, and phrase your response as "how in the fuck do you equate
blah blah with
blah2 blah2," which is a pretty confrontational choice of words, and seeing as how this isn't the first time there have been...misunderstandings between you and many people here, I think it's understandable that people are a little touchy when you get confrontational. And when people started voicing this ("Oh no, not you again!"

), you only painted yourself more into a corner by firing back with insults, telling people to go fuck themselves, and a gross generalization about a country of people (which I think is totally incorrect, I've seen some hysterical Germans and more importantly learned more about different cultures around the world from people on this forum than in any of the many classrooms I've been in). Just cuz other people start it, doesn't mean it's a good idea for you to continue it, and dare I say, if things were to deteriorate into a flame-fest, I don't think you've established much of a credit line for backup.
So my advice is, voice your opinions, but...try not to be so aggressive about it, even if people start with you. Patience is a virtue