Are Irish Americans in New York City fiscally and social conservative?

[Indy Texas]

Yeah, the Irish are pretty assimilated these days.

I've always wondered when did anti-Irish prejudice in America end? 

When they stopped immigrating here in large numbers. Immigration to the US in general was severely restricted after 1925. By the 1930s, it has morphed into a generic, less overt anti-Catholic prejudice, which in turn stopped being a significant factor in American society after the 1960s.