Maybe this man doesn’t need more religion. Maybe instead of pointing him to another denomination, he should be pointed to Christ.
Promote Jesus Christ, not your particular denomination.
All faith should be in God, through Jesus, and not men. The Catholic faith is a cult as is the JW and Mormons.
Be respectful of all cults, because there are honest and sincere believers of Jesus, in the catholic church as well as in the JW groups.
We are told that the cult status doesn’t actually matter- only the confession of the death and resurrection of Jesus for our sins.