Supposing ABC hadn't fired Kimmel, then what would Kimmel sue the government for? ABC did Kimmel and the rest of us a favor, by making sure Kimmel was actually negatively impacted by the government talking shit about him and thereby giving us a chance of this actually causing a legal mess.
The real danger here is that ABC did it before the White House ordered or told them too.
Fascists rise in power the more scared we are to speak.