Actually, Cuomo didn't pass this law all by his lonesome. There was quite a bit of support from left-leaning New Yorkers. Contrary to your characterization, Cuomo's comment is not about how his common sense prevailed over extremism, but how the side pushing for more gun control overcame the extremists on the other side to enact common sense regulations.
Regardless of whether you agree with that statement, at least don't purposely misinterpret what he said. That doesn't do either side any good because its intellectually dishonest.