There are some young fighters (captured wouldbe suicide bombers) who have confessed that this was told to them by their leaders. Some pakistani/afgan had posted a video of a young taliban confessing the same.
Read my post again. My question was about the authentic Islamic opinion on this issue, not about what has been taught to young fighters. There is plenty of evidence in print and online media about who is funding, orchestrating, training such fighters, but that is a topic for another debate.
So I shall repeat: what is the Islamic evidence, from authentic sources, that corroborates what illusion8 implied in post #11 ?