Muted for being an overall stupid person for not recognizing a joke when you see one, and contributing to the collective mob mentality of the internet, because now you will rally the other offendaholics who can't recognize a joke. If he was transphobic as you described, he would have not referred to caitlyn as a her. Pick your targets more carefully next time, lest you inadvertently run another ally over in the offendabus.