Truth is Truth regardless of respect.
To show respect for others, it’s simple:
“Don’t comment on the religious beliefs of other religions”.
Only comment/talk/ discuss/correct the religious belief of “your own” (that’s the right of every believer in his “own religion” only). Problem solved.
So, the best is to stick only in correcting/talking about one’s own religion and problem is solved (literally).
As the Holy Spirit of God taught the principle above to Apostle Paul himself when he writes
(the true biblical way of respecting other religions – literally):
“What business is it of mine to judge those outside the church (non-Christians)? Are you not to judge those inside (Christians only)? God will judge those outside (believers of other religions). “Expel the wicked person from among you (Christians).”.” (1 Corinthians 5:12 – 13)