Palpatine's Sith instincts go back to the rule of 2 [one Master/one Apprentice].....
from what we know this goes back to the descimation of the Sith Empire...
from what else we know of the Sith, they were held in check by the Jedi...
maybe this along with the death of his master at the hand of the Jedi [possibly] is the reason for his rage.....