By that logic, Hillary should have won Oklahoma and Nebraska, both closed primaries, but she didn't.
Whatever advantage she had did not help her in those states, and it's not guaranteed to help her win NY when Bernie has several weeks to use all of his resources to campaign there. It's also his home state.
You are focusing on two primaries vs the other 15 she has won.
Why do those two mean something but the others dont?
What kind of the logic is that? What similarities to Oklahoma and Nebraska have to NY, compared to every other primary make those two more important?
Home state in political realities means you have been apart of the government representing that state. Has Bernie interacted with NY in his 25 years of politics?