I can definitely understand the disillusionment of the Bernie Bros at that time. I was reaaaaally hoping he’d win the nomination.
Even as a European that whole situation really irked me. Especially the rhetoric of it being ‘Hillary’s turn’. Yes, she had a lot of political experience, but this is not an ‘it’s my turn!’ type of position. And Bernie getting shoved aside unceremoniously because it was ‘her turn’ didn’t do the Democrats any favors in the actual voting.
A lot of Bernie supporters had a post-Bernie hangover and got frustrated enough to check out of the political process. It sucks, but I understand. Let’s hope they’ll at least vote this time.