There are plenty of “truths” that are too controversial; look at achievement by different races and genders, and any shortcomings by one group are STILL blamed on oppression by the others.
The mental state of sexual deviants is another controversial truth, denied since the truth was suppressed for political reasons alone.
I told someone once, “You will believe anything, just so long as it is NOT true!” It seems that an ever growing number now fit that description.