If you follow the teachings of Jesus, you will love your neighbor as your self, and your ‘neighbor’ will include people who are identified by ALL ‘isms.
The gospel does not pigeonhole people. There are no ‘isms. All have sinned and fallen short of the glory of God. Christ is the only way to restore a severed relationship with God. If a preacher does not preach Christ and Christ alone, his message is of no use.