Whether or not they actually fire him, he's done as a teacher.
No matter what you are supposed to be the adult in the situation and hes throwing a tantrum as though he is a child. How can you say 'i want to be here' while saying you don't care what happens to the students at the same time?
He clearly doesn't want to be there anymore and he's stuck because if you have an education degree teaching is pretty much your only option. Hes not cut out for this kind of work and needs to do something else.