I don't agree with him, and representation of particular minority groups, including gender minorities, are important when they are particularly under attack. It is important to actively resist the marginalization of groups under attack by elevating their voices.
That said, I'm not sure what Jon did was actually "actionable". I'd say, stop listening to him and treating him as a leader? As someone with lots of close trans friends, I think this guy lowkey sucks, but I think this suspension is weird.