We don't know if all of them are victims of ISIS. We don't know if one in a thousand isn't ISIS, planning on attacking. ISIS actually has said they are doing that.
I find it fascinating how readily people will act and behave based on what ISIS does. Here's a riddle for you:
Step 1: Let's assume for a second that the marginalization of muslims leads to more hostility and radicalization.
Knowing that ISIS benefits from the radicalization of muslims, what do you think happens when their actions lead to islamophobia, which in turn leads to more marginalization? (Go to step 1).
If you think they're blind to this cycle, you are a fool.
The truth is that the majority of the victims of Muslim terrorism are actually Muslims. More children and teachers were killed in an attack on a single school in Pakistan this year than were killed in Paris. Every single one of those children and teachers were Muslim. Most Muslims all over the world are perfectly aware of this. Just this week Islamists captured a bus in Kenya and ordered the Muslim occupants to separate from the Christians so the Christians could be killed. The Muslim passengers refused, shielding the Christians with their bodies and saying they would have to be killed as well. Eventually the Islamists gave up.
Ultimately we are all either part of the solution or part of the problem. We need to work together and support each other to solve this. It turns out most Muslims want to be part of the solution. How about you?
Polls and anecdotes are not as good as internet discussion fora for getting to grips with how a particular culture actually thinks.
All an internet discussion group tells you is what those particular people on that specific discussion group thinks. Anyone who believes otherwise is beyond help.
Especially when your main source of news is the daily mail.