Trump has insulted everyone and especially those who challenge his point of view, net result isn't a witch hunt, it's all the insulted people fighting back. It's his own fault for picking a fight with just about anyone you can think of, even those asking generally unbiased questions he calls fake.
Obama was a politican, he mamanged to do a lot of things Trump bleats on about without causing so much fuss, like repatriating more Mexians than any wall will stop. I feel sorry for Obama, he spent so much time fighting a senate that wanted to stop him doing anything at all, whreas Trump has the support of the senate, so god help us all!