Would you trust Christ even when it does not make any sense. Would you believe that Them , because they preach the bible. For if someone belongs to Christ then you can see that as well. By what they preach the devils are not going to preach salvation. Also Christ is not going to preach live a happy life and life to enjoy it. Because they both conderdict the One that is behind it so check the spirit. For Christ calls Us to repent of Our sins and Love even those that hate Us. While the hater of our soul wants Us to live for only Ourselves selfishly. So choose wisely , It shall in the very end decide Your very Fate in the end.