Considering the questionable origins of christianity, which after 2,000 years the Jews have yet to buy into,?

the declaration by Constantine that christianity be the religion of the Roman Empire, subsequently banning Gnosticism, the burning of the library at Alexandria, thereby limiting the flow of any literature other than that of a christian slant, the thousands of deaths as a relult of the Crusades, the hideous torturings of the inquisition and witch hunts and the slaughtering of thousands of indigeonous souls around the world under the guise of Manifest Destiny is it any wonder that the entire ediface and intent of christianity warrants further investigation?