Hell, I'll make my own headline here. 27% would not answer this question (how many of the 27% do you think actually like al Qaeda, half, more?). This is currently making news as how mainline Muslim people are. It seems to be a feel good story on top of some really disturbing numbers. This is not a raciest statement, it's a survey, it's a fact.
So that's about 100,000 people (or more) in the US, about the population of Santa Rosa, that think that killing everyone and establishing their own religious government is the way to go. It is a real problem.
You can read the report and make up your own mind:
https://pewresearch.org/assets/pdf/muslim-americans.pdf
or you can trust the media to make up your mind for you.