What is wrong with ideology? Have you read Quran? Have you understood? No. Same wtih the terrorists; they have not. By the way, I do not think these terrorists are trying to spread Islam by attacks. If that was the case, scholars would have supported them. I came across a few people quoting verses from Quran, but when I checked Quran did not have such a verse and these people had taken from some website run by Christian. There is no problem Islam ideology or followers. The problem is those who have not understood Islam. I can show you a verse in Quran which means (I dont know exact words) "For you, your religion; for them, their religion."