I belive Mr. Gunn will still have a directorial career after this, And I'm sure disney didn't do this as a knee jerk reaction. They done there research, investigated, talked about it, talked to him, and then took action. It wasn't just 1 person going OMG! Fire him!!
As for being a "Changed Man" I support 100% the ability to change, to grow. One may have been in a dark place, alcholic, etc. Sometimes all it takes is for 1 person to give you a chance, and then take that chance and get better. As for Gunn, his old "jokes" are horrible, but he said it was an "Edgy" part of his life, fine take him at his word. But alot of the stuff he's saying lately on the Twitter in response to Trump is abit beyond the pail as well, not that he doesn't deserve some of it.
He'll survive this, he'll get other gigs, he'll do an apology tour, etc. However, I suspect that he's being defended because that he is on the Left, and if this was someone on the right, nobody would be standing up for him, or defending him. I hate politics, if he/she was/is a good person, but in the past has made mistakes, let them appologize, look at what they've done since, and either forgive them, or kick him/her out untill they have proved themselves worthy of being let back in.