Their founder is Gavin Mcinnes, the maker of the documentary short film "10 Things I Hate about Jews," later changed to "10 Things I Hate about Israel."

This "film" was posted to Ezra Levant's Rebel website and is probably still there.

The bizarre attitudes toward women and sexuality are described here, with some video:

https://medium.com/@willsommer/the-fratty-proud-boys-are-the-alt-rights-weirdest-new-phenomenon-7572b31e50f2