I think you can answer that for yourself.
What is their stance on salvation? Is it works based or faith only as noted by the Apostles in Romans 4, Hebrews 9, 11, etc.. If it is not faith in Christ, it is another form of salvation and thusly a fraud.
That would be the starting point for telling the tail. First and foremost do they have the Gospel message right. If they're mixing faith and works for salvation, they're nothing more than the Judaizers in new clothes. Given that the Apostles spoke directly to this in no uncertain terms, it's staggering the number of people who don't know even that much.
And those are in our CHURCHES!!!!!
Biblical 'illiteracy(?)' is rampant!