In a way, it kind of is though. We know as a female candidate her womanhood is going to be picked apart and there will be double standards.
The tweet that started this is apparently alleging that she slept with someone to get to where she is. I'm not familiar enough with her career or personal life to know what happened but I'm not going to take a snarky tweet seriously. Then we have others making sexist jokes. Trump has already called her "Nasty" too, as he likes to call any woman who challenges him. This is all part of it.