Charming. You know, I've got no problem with these in theory, any more than I would Underoos. If you want to deck your kids out to reflect a Christian belief, have at it. But referencing the crusades, which by any reasonable definition were not exactly Christianity's shining highlight, is a bit, uh, disturbing.
What I especially like is how they manage to reinforce gender stereotypes, too. (Hat tip to Oddjob.)