Crusade vs. Jihad

has any one noticed how similar christianity, islam and judaism really are they all mention abraham they all mention jesus, non of the religions are ment to eat pork, all your holy lands are in the same place (thats just a few) and still not one of u can get along it make no sence to me. i think all organised religion is BS anyway, im not saying i dont believe in god but if thier is a god up thier surely he woudnt care how we follow him.