Basically that there's a double standard at ESPN. If you hold public conservative opinions, you can be fired. If you hold public liberal opinions, that's apparently okay.
His point was that ESPN has fired people for making public political statements in the past. (And even for things that were misunderstandings.) This time however, for some reason she's getting a free pass on it.
Say what you will about the past, I think they've made a few bad calls, fired people over some dumb stuff, but in the specific case he mentions, Curt Schilling did have a habit of reposting and retweeting things that wouldn't be SFW, and given he was in a very public position it's fair to say ESPN might care what he says, even in a non-official capacity.
Basically, ESPN has fired people for less than what she's done.
Do I think she should be fired? Probably not for this one instance. But I do think that it's a fair point that people don't necessarily want politics in their sports and ESPN is losing subscribers by the truckloads... (Likely for other reasons, but it's fair to take a look and see if politics has anything to do with it.)
On the other hand the other guy barely got out "I know her, and she's a good person."