What do ‘Lock her up’ and ‘Send her back’ have in common? It’s pretty obvious.
Yeah, he's an equal opportunity asshole, just as long as he enjoys every opportunity. Women, non-Europeans, and LGBTQ people all must be stopped. So, his fanbase chants the same hate-speech, it's not just against women, it's against women in positions of Power, speaking openly about the problems with our country.
"Lock Her Up" was about Secretary of State Hillary Clinton.
"Send her back" was about a Legislator, speaking out in the legislature, literally the job she was Elected to do.
In a word, what they have in common is Hegemony. That's the threat, to white male oligarchs, and their constituents.