Eh, not really. This is not an admission of support. Here's why.

I've seen firsthand what it looks like when these creeps invade tolerant spaces. We're talking clubs packed full of goths, punks, metal-heads, very gay people, and the occasional furry. First, it's just one or two. Then their friends show up. You may not even realize it until it's too late. And there they are, happily mixing it up with everyone else. Their bigotry is usually only evident when put to the test, and there aren't a lot of situations where that's called for. But provoke their sense of 'correct' social hierarchy and things get bad, fast. Then the bouncers get called in to handle the really stupid/violent ones.

And that's where the problem lies with this statement. Nazis have zero issues standing side-by-side with the people they hate. Just as long as they know they can seize control or maintain the upper-hand whenever they want, is enough. In this situation, we have someone running for public office, versus someone who's just a voter. They'd be holding all the power in this situation, and didn't admit to lending that power to a trans person in any way; something that would divorce him from Nazis support. So, the assertion of "stand by your side" isn't even worth the electricity it took to get it to our screens.

Trump's made a million "good thing" promises.

This dude is obviously prone to making either bad, and/or - at the very least - poorly-informed choices. Not the qualities of a good leader.