you forgot to explain turf wars.
Basically, someone who has followed your rules and worked hard for decades is not going to give up their position just because some newcomber has worked really hard for a year or so.
It is why the white population feels entitled to exclude other people from immigrating to the US in spite of the fact that the whites immigrated here and displaced the indians.
The whites have been the incumbent population for two centuries now and they feel entitled to keep that position.
The incumbents in the republican party have been at it for decades and they feel entitle to keep that position over relative newcomers.