Why do Muslims hate Jews ?

​Most Muslims do not hate Jews, though many do. The animosity of some extends all the way back to the forced separation of Hagar's son, Ishmael, from Sarah's son, Isaac. Ishmael was technically Abraham's first-born son, and Hagar used that against Sarah. The subsequent, similar estrangement of  Esau from Jacob cemented a strife between the bloodlines of the offspring of Abraham and Isaac. You could say, in a sense, that there is almost a genetic proclivity toward strife between the descendants of the four brethren. Fortunately, this will be remedied when "Thy Kingdom Come..." arrives and the breach in their relationships are healed, uniting them in peace and harmony.