The poll was reposted by tens of thousands of other people and more than two million people voted. Also, this was before he bought the site or made unfriends with Democrats and his followers skew disproportionately to electric car enthusiasts and Star Trek fans. It's not exactly a poll of Fox News viewers.
You’re not doing a very good job of arguing the poll was anywhere near scientific. And at any rate, he upset a lot of people long before then. Do you not remember the whole “pedo guy” brouhaha? And the “I can take Tesla private for $420/share” bullshit that got his in hot water with the SEC?
70% of his followers and/or who saw the poll said it didn't. Hardly a valid survey by any best practice among pollsters.