I doubt Bush and Perry "hated" each other any more than Reagan and Bush's father "hated" each other.
Politicians being practical people can smooth over ruffled feathers if they want to, so there's no reason for resentments to fester.
But if Perry runs he'll slam Bush to build up his own conservative credentials, and Bush will respond by playing coy about endorsement or support.
Ex-Presidents don't want to get too closely tied to any candidate for the nomination. I could see Bush making quiet positive noises about Romney or Huntsman if Perry is in the race and sniping at the Bushes.
But Palin? That would be interesting. The fact that W's not expected to make an explicit endorsement would probably prevent him from getting in the middle.
“But Palin? That would be interesting. The fact that W’s not expected to make an explicit endorsement would probably prevent him from getting in the middle.”
The dominant hive queens in that nest would not remain quiet, even if the drones were. They could not help themselves.
He will just let his old abortion lovin momma do it, that is the Bush way.