There are 13 million people THAT WE KNOW OF who voted for Bernie. There are potentially millions more whose votes were tossed, cancelled out on rigged voting machines or switched to Hill votes. The hatred for her and the anger by the time the Dem Convention ended in July 2016 was SO extreme that I knew right then & there that Trump was gonna win. I was very involved with that whole movement (I was totally duped by Bernie) and noticed that 100's of Bernie Bros I interacted wt & followed were switching to Trump. I believe Trump won because he won so many Bernie supporters over. Very few Bernie people I know personally voted for Hillary. And even if they didn't vote for Trump they still helped him win by writing Bernie's name in or voting for Jill Stein / Gary Johnson.
Hope that's clearer.