Because when George Bush became President he would not do anything to the Clintons and wanted to play nice. Nothing was mentioned about all the damage and childish behavior that the Clinton Cartel did when they left the White House.
That is my problem with the GOP. If anyone other than Trump was their candidate, this is how they would debate: “I considered Secretary Clinton (Even though she isn’t a secretary) my friend, but we just disagree on a couple of key issues.”
That is how both Romney and McCain debated.