You can call it pretending if you'd like(though I don't think someone like
@InternetHero is pretending) but the point is in theory they actually care about spreading their religion to other people in order to save their souls while the Jews really don't which is probably why its far harder to convert to Judaism than it is Islam or Christianity.
Oh I know, I'm just saying that the distinction between Jewish imperialism vs Christian or Islamic imperialism is that the former wasn't ostensibly undertaken to spread the faith like the latter was.
The Christians were far more outnumbered by hostile entities than the Jews were though given they were a small sect being persecuted by the most powerful state on the continent. The Jews on the other hand were one ancient state surrounded by other ones in their infancy, a more preferable state of affairs I think. The Christians were able to turn it around eventually because they proselytized more aggressively than the Jews ever did.
The Arab Muslims were probably the most fortunate. They seemed to face tough odds at first when dealing with their fellow Arabs before they united the peninsula. But after they did they formed a nomadic tribal confederation, the nightmare of the settled civilizations. Its as Ibn Khaldun said many centuries later, the Arabs were a fierce barbarian peoples who could overrun the decayed settled societies of their time only to become such a decayed, settled society themselves and later find themselves overrun by a new group of barbarians in the Mongols.