I think leftists are full of self-hatred. Orthodox Jews that I know don't have this problem. In fact, leftist Americans in general are full of self hatred - but conservative Americans are not. Interesting.
I am on the other side of the spectrum. Jewish by birth, born in Israel as an American citizen, and married to a Catholic. I agree with you on the self hatred. I have never understood how a Jew could be anti-Israel. Unfortunately, I have met many such Jews. However, things are changing. The anti-Zionist Reform Jews are dying out. They have thrown away so much of Judaism that they don't have what it takes to stay as Jews. This is why Conservative and Orthodox congregations are growing as a percentage while Jews are declining demographically as a whole. We don't have the self-hatred that is endemic in Reform Jews.
I for one feel much closer to Christians than to Reform Jews. More shared values. I find it interesting how many Christians in the USA are exploring the Judaic roots of Christianity, something you will never see done in Europe.