I think the poster was on the wind up, and if he got banned for being on the wind up, I've got no problem with that.
The issue the Frank Sinatra raised, and one I agree with, is that you can not punish every CSKA fan for the behaviour of other CSKA fans. It's absolutely ridiculous.
I find it quite astonishing that you think this individual CSKA fan should be obliged to make his personal quest to eradicate racism from his club, and until it is eradicated he has no right to comment on any other matters! I don't think that's very realistic.
The fact is, the guy made absolutely no racist comment, he in no way tried to justify the racist actions of others. In fact, the only reason racism got brought up was because he was a CSKA fan and they have a reputation for being racist. Guilty by association. Stereotyping. It's where mass prejudice / racism comes from.
The German analogy is apt. If a German made a comment about City fans being classless it would be absolutely ridiculous to say "Well some German's are fascists so you've got no room to talk". Exactly the same as it's ridiculous to say to the CSKA fan "Well some CSKA fans are racist so you've got no room to talk".
Judge people on their actions, their deeds. Not on the actions of people who look a bit like them, live near them, or support the same football team as them.