Trump got the Republican nomination, but it's a grave mistake to think that everyone who voted for him was a 'Republican.' And a lot of actual Republicans DID NOT vote for him.
The DUmmie who is being mocked for inartfully saying Bernie would have gotten a lot of Republican votes does have a point, in that a lot of people who voted for Trump to prevent a Clinton Presidency would have cheerfully voted for Bernie because he wasn't Clinton and wasn't Trump. A lot of the union blue collar voters who went for Trump would have been a lot more comfortable with voting for Bernie than Hitlery or Trump, and it could have wiped out Trump's margin of victory in the upper Midwest.
Trump trounced Hitlery in this neck of the woods, but I have heard plenty of the locals express the sentiment that they weren't voting FOR Trump, they were voting AGAINST Clinton. While they do like the idea of him rolling back EPA's power-and-land grab, Obama's executive orders, and bringing back some order to the border, they also aren't insanely optimistic about how much of the mess will really get done and how fast, and just thought she was a lot worse. They would not have turned out in droves if he had been up against a less-corrupt or more-likable opponent, and a lot of them would've gone with their union recs.