Hamas has no defacto power outside of Gaza. Pa had no power because of israel and the west support for israel.
Here what should happen. The west and the usa should stop siding with israel. Israel should have cuba style sanctions to force them to end the occupation of the west bank , hamas should be asked to surrender in exchange of ending the blockade. If hamas refuse , the west should provide the PA all it needs to to destroy Hamas.
Of course it is not easy but it is logical