Everyone in Afghanistan and Iraq knows how to make road side bombs. They learn from their fathers and uncles. Monkey see, monkey do!
That's weird. Why would you make jokes about such an awful war?
I don't know. I just think they are stupid, violent and cow-fuckers.
It's not right to think that all Arabs are violent as a generalization. While of course some of them are, the majority just want to live a normal life. I think you should read up on the Arab culture and see how they really are.
Not all of them are evil, just look at the good ones.
You're right, there are a lot of good Arabs out there and by making these joke you're making them sound like a horrible people. This is a dangerous thing to joke about, and can upset a lot of your potential friends.