Nassau County used to be part of Queens and that is apparent based on similar names on both sides of the city line. Little Neck is in Queens adjacent to Great Neck in Nassau County. There's an East Rockaway in Nassau and Far Rockaway in Queens. Also, some towns in Nassau on the Queens border have the same name as the QUeens neighborhoods on the other side, like Floral Park and Bellerose. Furthermore, many zip codes straddle the Queens-Nassau border.
Rockland has none of those. It does not border any borough of NYC nor share any history with it. In fact, Rockland County used to be part of Orange County (which is upstate according to most Rockland County residents) until about 1800. This is why Orangetown is in Rockland County.
-Doesn't make sense
guy from Westchester: couldn't afford a house like this in Westchester?
Rocklander: Couldn't find more than a quarter acre of property except near Putnam County or that wasn't already a golf course.
Long Islander: Why are all the houses different? They aren't even all yellow!