Intolerant is a loaded word, and I think incredibly poorly applied in this case. I'd love to say more but I don't want to cross the line.
Well there is disagreeing with someone, and then there is comparing him to a Nazi sympathizer and to a convicted felon, and alleging that he has done some (of course, unspecified) "despicable things"---all, it seems, because Mr. Koch supports conservative causes. I do not think Mr. Koch deserves this, and I for one am grateful for his support of NYCB and ABT.
He spends an enormous amount of money on philanthropy; however, even he cannot support everything. There is still a lot of good philanthropic work left for the rest of us.
He (and other libertarians) does not want to remove funding from all these organizations. He wants their supporters to contribute voluntarily, instead of being forced by the government to do so. One can argue about the pros and cons of this approach. However, considering that about 99% of taxpayers will never, ever watch a ballet, I do feel guilty sometimes about asking all of them to subsidize my expensive habit of going to lots of ballet performances.