counterfeit Torah.

Maybe Leftism is rage against pseudo religious people and counterfeit religiosity.  ( It does not have to be from a bad heart to be wrong. Maybe it is like the original Enlightenment. People just got tired of pseudo religiosity. If they only people that were openly religious would have been the ones that were sincerely religious then I doubt if the Enlightenment would have gotten of the ground.
What has been noticed is a lot of people use religion for personal gain, and also a lot of religious people are insane. And they try to win people over to counterfeit Torah. In fact this is the vast majority. The actual authentic yeshivas where real Torah is learned are rare.

 Most of the religious follow leaders who are  spirit mediums, that channel information from the "spirits" who communicate with them.  They make a show of keeping Torah but the whole philosophy is דורש אל המתים--In the category of the verse "Do not seek the spirits of the dead."

"There shall not be found among you anyone who... practices witchcraft, or a soothsayer, or one who interprets omens, or a sorcerer, or one who conjures spells, or a medium, or a spiritist, or one who calls up the dead. For all who do these things are an abomination to the Lord..." Deuteronomy 18:9-12