I don't actually approve of hate speech laws unless there is an overt call to violence.
This moron should face the consequences of his actions. He does actually call for genocide. That crosses the line for me. Suspending him from York is a given. I am still uncertain about charging him. He will probably become a hero of the left.
The rest of us should just ostracize him and socially isolate him. I have many Bangladeshi friends. His parents must be mortified.