I question whether or not you are adressing truth or fact here. Something does not need to be fact for it to be true.
Personally, I believe that if someone holds a belief then that belief is true, to them- respect doesn't come into it.
Although an athiest, I have no problem accepting that some people find truth in God, because to them, God is true- I may view these people as perhaps naive, and disagree with their truth, but I can still accept it as being true to them.
Unlike fact, truth is not a unifying definative...
We could of course go into the whole... well nothing can really be true because we cannot really be sure of reality etc etc... but I fear we would never end if we started that one...