That's fine that you think that, but stating your beliefs about other member's claim of Christian faith is between them and the Lord and is against the ToS to state your opinion on this board. See below:
7) Do not post opinions of another member's claim of Christian faith. (ToS 2.4)
Publicly judging someone as not being a Christian and/or not following Christ unless they themselves claim not be a Christian is disallowed. That's between them and the Lord. This includes judgments against collective beliefs or groups in general.
Now, if you want to talk about the issues then that's fine, but otherwise it's none of your business.
I have posted my opinion of some members' not any individual member - twinc