The idea of jihad, holy war...was a special Muslim idea. He [Salman] explained it like this:
"In Christianity, Christ died for all Christians. He can ensure heaven for them. In Islam, Mohammed can only make a submission in your favor for being a follower of his. It is only Allah who makes the final decision on the merit won by your good deeds. Nothing is greater, so far as goodness goes, than jihad in the name of Allah."