The "Drumpf" thing, in context, was a response to Trump criticizing Jon Stewart for not using his birth name "Liebowitz", implying that Jon Stewart is a self-hating Jew.

Which isn't great because (a) it's still not a great argument against Trump's policies, and (b) pointing out Trump's hypocrisies is pointless, but the point being, there was more to it than just "Drumpf is a funny name".