I'm not a religious scholar (IANARS), but I think proselytism has something to do with it. Christians have their missionaries and Muslims their Dais (someone check me on the spelling). They're competing for people to recruit, whereas Jews, while accepting converts, doesn't actively recruit people.
Although, Christians have done terrible things to Jews over the centuries. And still do.

Also, Jesus was Jewish...

"The basis of optimism is sheer terror" - Oscar Wilde