Her wanting higher taxes on the rich isn't what's insane. It's wanting to tax up to 70% to fund one plan. It needs to be more thought out and thoroughly detailed, better planned for criticism and potential future issues that may occur if you want to bring up taxing up to 70%.
1- I pretty much agree. It is an issue that needs to be addressed. The discussion should boil down to how we address it, but in no way should it remain as is.
2- I don't think there is long term thought here. Ultimately the goal should be to move away from fossil fuel permanently, but a 12 year window to completely do away with it entirely like she is stating sounds very ambitious or naive. Electric cars haven't even fully gotten their due yet, and all cost 35k and up Some even 50-60k or more. Used electrics cost 25-30k. 12 years from now a Tesla 2020 very likely won't cost peanuts on the dollar, so you have a situation where people of very low income won't be able to afford a car because we've wiped out fossil fuel usage. Nowadays people can go down to the local car guy, buy a 2001 Toyota for cheap, and get to work or around town. If you removed fossil fuel completely in 12 years you are going to hurt those people much more than the "rich people" you target because they can afford it. The car is just one example of quite a few that would have unintended consequences affecting those with lesser amounts of money.
She is, because she says things that are either stupid, without context (tons of blanket statements), inaccurate, or without solid explanations. She is obviously a smart individual given her background and accomplishments, but has a lot to learn. Being in the forefront is going to hurt her more than help until she gains more experience.