I didn't say that other Muslims thought that it was okay, just that radicals have found a twisted way to justify their actions. Also, are you aware that one of Trump's top priorities is stopping terrorist attacks from ISIS? What he's saying is that these people believe that what they are doing is righteous, but he does not by any means agree with their tactics. I've read many articles that relate ideas similar to the ones you suggested, but almost all of them leave out major details, not to mentions that nearly all are from the same few news outlets. Instead of reading only what you want to read, try to explore other points of view to broaden your understanding of current events.