8% of Muslims in the US find suicide bombings acceptable. That's a quarter million Muslims.
Suicide bombings violate one of the ten commandments. The Muslims who do it and support the general practice has to belong to an awfully perverted and twisted version of Islam. Not saying they aren't real Muslims/Scotsmen. Each to their own. But the idea that 8% of American Muslims support it is dumb. 8% of American Muslims obviously aren't "fundamentalist" extremists. That would be absurd.
There's many ways that question can be phrased to bump up the number. Self sacrifice for a greater cause is big in Islam. They have a huge focus on martyrdom. So if the suicide bombing question is phrased in a way that you give your life to protect other people a lot of them would say yes, in spite of it violating a commandment. It's all in the phrasing.
Or it might be phrased as "can suicide bombings ever be justified". Obviously yes. We can (Muslims and non-Muslims) all think of a corner case where it can be justified.
The reason the Palestinians are so happy about it in Israel is because it's very very cheap. And it effectively kills the investigation into the terror cell, because the perpetrator is dead. It's got very little to do with Islam, and more to do with pragmatic issues of warfare. ISIS do it because they're evil cunts, rather than Muslims. Almost all Muslims hate them.