Maybe maybe not. In NY CIty there was a teacher who was a member of NAMBLA, he openly promoted sex with kids but the teachers union would not let him be fired. He spent around 5 years sitting in an empty classroom (they at least had the good sence not to let him near kids) fighting his termination. He was eventually fired.
Openly speaking of sex with children in a school and promoting it, is the kind of speech that should be outlawed, regardless of the slippery slope argument. Some time here soon we will have to draw a line.
They don't need to fire this guy, he is going to prison. He can't make it to work if he's sitting in prison.
Being familar with the system in New York, I can vouch for that assessment - it is one of the most difficult places in the nation to fire a tenured teacher. Fortunately, very few other states are that extreme in protecting teachers. I suspect that it is much, much easier to fire this guy in Florida than it would be in New York.