If the only reason you can give for the hate is Eisav soneh es Yaakov, why in frum places like Five Towns, Cleveland, and LA do you not have the opposition to frumkeit that Ramapo has?
In a way, you are right. Eisav hates us and always will. We are in Galus and Hashem sends us constant reminders of that. But some of us choose to ignore the reminders, pretend that we rule the world, and give Eisav more reason to hate us. We should always remember our place in this world. The goyim rule over us until Moshiach comes. When we fight that idea, like what Ramapo Yidden have been doing, they just grow stronger, as evidenced by Mawah, Airmont, and Pomona.