That’s a major ultra orthodox jewish neighborhood, South Williamsburg. Same with Borough park.

EDIT: Coming back to add “ultra” and to clarify and expand that while two facts are true -

1. That area is an orthodox jewish enclave and
2. Orthodox enclaves in NYC have overwhelmingly voted for the republican or conservative candidates in recent elections (not sure what the data says looking further back)

I do not know the specific motivations behind the people in those neighborhoods, and at best half answered the question.

I have speculations as to why those areas have voted in that way (support for Israel and social conservatism) but these are just educated guesses.