She's being attacked for a number of valid reasons.
1. She doesn't understand government. She has no clue what she's doing.
2. She doesn't understand economics, and supports socialism, which apart from being an immoral system, is a system proned to abuse, corruption, and simply doesn't work.
3. She talks out her butt on the things she doesn't understand, and says some very stupid things that don't make any sense.
4. She's in the realm of politics, where everyone is attacked, no matter what.
Being female isn't the issue.