Of course they were attacked. In words of course too but there was also the fire-bomb. If that isn't a attack, what do you need?

"Muslims have no voice" - I am sure that the muslim media in France has a lot higher circulation numbers then the circulation of Charlie Hebdo. Not the count all the muslim ministers, parliamentarians, mayors civil servants journalist etc. in France. And the official representation of muslim organizations.

"There is no freedom for hate speech."

Define hate speech. Freedom of speech has to include undesirable speech or it isn't much of a freedom.

"And even though this is not hate speech in the legal sense, "

well, in this case where is the problem?

"it functions as hate speech,"

That assertion you should perhaps prove at some time

"which is why I criticise Charlie Hebdo's despicable publication."

You see an despicable publication, I see a rather mild satire and an attempt to assert their right of free speech.

That is at worst ill-advised. Not despicable.

"I note that you categorise my speech as an attack on free speech: apparently only anti-Muslim speech is free."

What anti-muslim speech? And categorizing an satirical publication as hate speech is an attack on free speech. I on the other hand haven't tried to suppress your speech or demanded suppression or whatever.