Just because these dolls happen to be sold in putatively secular surroundings, doesn't mean that they're intended as a jab at Christians specifically, or Christianity in general.
In fact, I purchased one of those figures-they also produce a similiar Moses action figure-as a present for my mother, and she seemed to enjoy it.
So far as I know, we aren't Muslims and aren't obligated to follow any sort of proscription against representing Christ in paintings, statuary, sculpture, etc.