It's not the 'thin end of the wedge' when an ideology that caused the deaths of over 50M people in a mere half-decade is verboten. How many deaths were caused

It's not the 'thin end of the wedge' when an ideology that caused the deaths of over 50M people in a mere half-decade is verboten. How many deaths were caused by religion? People simply believing that God plainly told them to do certain things (It's God's will). Shall we ban "climate deniers" too? Imagine the death from climate change? Animal rights activists? slippery slope. Been dealt with it by SCOTUS perfectly