Certainly, poverty and economic decline have a lot to do with the so-called rage of Islam. You've got all these young men in countries which are economically in bad shape. The idea that they might be able to make a good living and get married and have a family, a decent life, seems very remote to a lot of people in a lot of the world.
I can walk into a bookshop and point out a number of books that I find very unattractive in what they say. But it doesn't occur to me to burn the bookshop down. If you don't like a book, read another book. If you start reading a book and you decide you don't like it, nobody is telling you to finish it.