I think my gripe is the same as all racist comments. Applying something that's true for a small subset to the whole group. If you want to be specific about what type of Jews support this practice, it's a very specific community of Ultra Orthodox Jews. I tend to fall on the side of all extremism being bad, so if someone wants to say the most extreme practitioners of a given religion are bad, then that's fine. But one should not don't talk about Jews as a whole when it is but a small subset within the Ultra Orthodox community.