This is actually a reversion to traditional, tribal morality. Violating social norms and thus undermining cohesion of the group is considered as bad as assault or murder.
That is the logic Islam uses to execute atheists, openly practicing pagans and women who won’t veil.
This is the logic of African people today who murdered a woman for eating a forbidden fish. In 2019.
Liberals have reverted to tribal morality. They are laying the emotional foundation for it - that public offense is the basis for organizing a violent lynch mob to kill the blasphemer, the unbeliever.
Hate speech is modern blasphemy laws.