Had they confined the reason for his rejection to behavior such as throwing the chair and misdemeanor charges they might have gotten away with denying the approval. But, by citing his opinions, the City is now opened up to a lawsuit on free speech and view point discrimination grounds.
They are going to get away with bringing up his poor language choice because he threw a chair 6 stories off a building and almost hit police officers. They didn’t need to bring up the language but they want to make it messy. He can fight the free speech thing but it won’t get him a big sign.