I lean Republican. Or at least I did, pre-Trump.
I condemn this. It's repulsive.
The only mitigating circumstance I can see is that Trump in fact may not have known all the contents. He's got people posting for him. (Given the rate at which he posts, he pretty much has to.) And given the rate at which "he" posts, even they may not have watched the video all the way through.
Or they may have, and decided that it did in fact match the tone that they thought Trump wanted to convey.