Naturally. Sent to put an end to the Muslims attacking people, yet there was evil done, fraudulently in the name of Jesus. Jesus doesn't authorize evil. Same with the Inquisition. That was all evil and not sanctioned by God. Throughout time Satan has used religion to kill humanity. Jesus didn't come to start religions. He came to renew a relationship.
He can't. It's obey God or obey the world. God says share the good news while the world says shut up and keep it to yourself. We can only follow one and having read the last page of the Book that says God wins, we choose God. The good news also comes with a warning. Though we understand the world doesn't believe it, we share it anyway in hope of saving as many as possible from the coming judgement. It doesn't hurt that if everyone followed Jesus' teachings the world would be a far more peaceful place.
Chill? You do you all day long. You might live as long as 120 years in this life, but the choices here will define your zip code for the next infinity. My prayer, my hope for you is that you don't burn for eternity. I noticed another commenter, that apparently isn't a follower of Christ, was saying some "denominations" are ok with it.... Technically accurate but not biblically supported. I wish you no ill. I want you to be healthy, happy, and that you live a very long life. I want you to have enough time to seek an honest relationship with Jesus the Messiah and join Him here and in eternity. Be aware that if He returns before you turn around, it will be too late to choose.