I"m not sure where you're getting the idea that Jack disagrees with most or even many of Trump's policies.

edit to clarify in response to parent's edit (lol):

I don't doubt Twitter enjoyed being the primary platform for our extremely online president. I was getting at the "political opponents" thing. I feel there's a tendency where people like Jack and Zuckerburg get categorized as "not on the right politically", because they work in tech and live in California I guess. I disagree with that characterization, and my main reason is how they've allowed their platforms to be used.

For a very long time now, I've personally seen Twitter being used to amplify regressive, right-wing views while quashing (via suspension or permanent suspension) leftist voices that challenge them. The best way I can describe it succinctly would be a pervasive double-standard when applying their rules. So I, personally, specifically do not believe that Jack or Twitter leadership have aligned themselves politically against the right.