There seems to be a lot of commentary these days making the point that not all Muslims were guilty of the 9/11 attacks, so it would be wrong to collectively blame Islam or any individual because he happens to be Muslim.
Fair enough, but I don't know of anyone who holds this view, at least expressed this crudely. Some made statements that are apparently motivated by anti-Muslim sentiments, and it's likely those sentiments were brought about or intensified by 9/11, but I don't know anybody who would say that all Muslims are guilty of 9/11.
As such, it is difficult for me to imagine a reader be persuaded by a statement or argument that it is wrong to hold Muslims collectively guilty for 9/11, because it is difficult for me to imagine a reader who would (even to himself) cop to this view. Again, this is not meant to say that there is no anti-Muslim bigotry in America, or even that it has dwindled to anywhere near an acceptable level. But it is a bit more nuanced than can be effectively engaged in a tweet-size message.
Which isn't to say it's right. But turning it around is going to take more than platitudes about the wrongness of collective guilt.