New York has had Republican/Independent mayors for 20 of the last 21 years. And you ignore that heavily taxes cities controlled by democrats are some of the most impoverished, crime ridden and unsuccessful in the US. Namely, Detroit, Baltimore, Oakland, New Orleans.
This is pure FUD, coming from a seemingly very targeted throwaway account. Thinking that crime in a city is directly correlated with the political party of the mayor of that is naive at best.
Giuliani likes to tout that he turned NYC around, but his direct role in it is far from a settled matter. TL;DR: crime dropped everywhere in the early 90s, not just in NYC. [1]
Plus, how does your fearmongering about the current mayor jive with the fact that he brought in the same police commissioner that Giuliani did back when he took office?
They also make it difficult for anyone that isn't extremely wealthy to live there (the average apartment to rent in all of the cities you mention is $3000+) and the more restrictions and taxes for businesses make it so only huge companies can survive.
I never understood why a community of business owners applauds more and more taxes and restrictions, which will further make it difficult for you to run an actual business.
Edit: I know why. Because most people here don't run businesses or startups.
I'm not sure extra taxes and restrictions really make it harder to run most businesses. You just pass the extra cost on to your customers. That customer in Manhattan has enough money to pay $4000 each month for rent. He can afford to pay twice as much money for your service as people in rural areas.