What do a "suicide bomber" think about?

They think they are fighting for a cause. Remove the reason. The Japanese soldier in ww2 thought he was dying for the Emperor and something great. That changed so can these things. I believe they are brainwashed by men that are using religion. Religious leaders should convince the nations that their God is a God of peace (that is the name) and that this God does not support their actions. To obtain peace mutual respect is the only true answer.

They thought its a sacrifice to their belief.

It is hard to imagine why someone would do such a thing but they are sick people and are crazy and look to harm as many people as they can and do not care about themselves. They believe they are doing good for their people and their beliefs. They are followers of evil in my opinion. It is sad because we are trying to help people and their countries but yet these people are ruining the peace efforts.

they have no self worth and have no brains thats why they are ready to die for money or whatever.

It's not that they don't have self worth, it's they believe they are doing the work of their God. They are delusional as all get out. They will be awarded on the other side for their works.

I would do it for free , i could careless seriously, They do it because they hate iraq

all they think about is the seventeen beautiful virgins waiting for just immediately he pressses the bomb button.