Can someone please give me an intelligent answer on why Islam radicalists feel the need to blow stuff up/kill?

I know that this is a sensitive topic and I am probably not asking the question exactly how its meant to be asked. But I just want the gist behind the islam mentality and intent for events like the world trade center bombing and boston marathon explosions? I want a purely logical answer that is free of any kind of... show more I know that this is a sensitive topic and I am probably not asking the question exactly how its meant to be asked. But I just want the gist behind the islam mentality and intent for events like the world trade center bombing and boston marathon explosions? I want a purely logical answer that is free of any kind of hate and racism. Please!! Thank you
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