There is no "if" Jesus is literally descended from the Davidic line and was called the King of the Jews twice. Whether he was killed by Jews, Romans or whatnot is irrelevant. He was basically a 'Pretender to the Throne' in hiding of the Jewish people under Roman occupation at that point. In fact, one of the reasons Jesus was targeted by the Romans was because they were aware he was the King of the Jews as he was charged for claiming. Logically, Romans don't like it when peoples they occupy get their Kings sticking out as a sore thumb.
What caused Jews to conspire was that Jesus also preached many heretical teachings that were totally in contrast to the Old Testament Laws and several Mosaic laws. Given the religious extremism of Jews at the time, during Roman Occupation, shit can happen. Reactionary... you get the idea. The Pharisees, Sadducees and etc, all turned against Jesus. Why did Jesus do this? Why was he heretical to the Old Judaism? Maybe Satan's temptation of Jesus was actually in cahoots and actually got through to Jesus. Satan promised Jesus wealth, maybe that is why Christianity is the largest religion on earth by followers.
Romans were the ones who crucified Jesus and it was part of "God's plan" to have Jesus killed anyway. So that Jesus can die for the sins of Countless Jew Worshipping Christian Gentiles so they wouldn't burn in hell for a literal eternity for a few tiny sins they committed in their too short mortal lives who will at least not live longer than around 100 years. I actually thought Gentile Christians would thank Jews because we killed our basically Pretender to the Throne King so they can all live in Heaven for his sacrifice.
But I can't take a religion that views a Torture Device as a symbol of Peace, Prosperity and Salvation seriously.
And besides, much of what you know about Jesus are mainly about what the Romans want you to think about him.
There are many books and texts about Jesus that were burned and destroyed by Constantine and the Roman Empire and the Books of the New Testament were among them but just the ones spared and selected. The Christian Religion and the entire New Testament is based on a set of books selected by Constantine to form Christianity that were spared from being destroyed. The entire Christian religion is a forged politicized Roman religion appropriated from Jewish religion.
But what do I know? While I am ethnically Jewish, I don't take my ancestor's religion that seriously and I'm personally an agnostic.
You're in an Asian forum, so go spread your ethnocentric Jewish propaganda elsewhere.
Are you also not aware that Judea/Israel is also in the Asian continent? Maybe you should be a little bit more specific if you're gonna be a smartass.