Recently someone made a thread about 'Rape Culture' in the US and linked a video from Steven Crowder in the OP. I didn't knew who Steven Crowder is so I clicked a little bit through his channel and came across this video.
I found that very interesting because I remembered that I saw people on this website with the same theory.
To put it short, he's wrong and I found a greate response video which explains, better than I ever could do myself, why he's wrong.
I think the main reason why someone would believe in something so strange is a misconception and oversimplification of the political left and right into "more power for the government" and "less power for the government".
There are tons of credible scientific material about Hitler and the third Reich and it's hard to believe Steven Crowder haven't seen any of it when he did his research for this video and his article. It seems to me that Crowders intent for this video was to discredit a political views he disagrees with by drawing a line between them and the Nazi regime.