When you've tasted the pure teachings of Ahlulbayt (as), there is nothing that can replace it.
When I was young, I use to have these random thoughts, that maybe we're wrong after all. I wasn't certain in the Imamate, Ahlulbayt (as) etc. However the more I gain knowledge the more I realize that the madhab of Imam Jafar Al Sadiq (as) is the only madhab which is based on rationality and truth.
We Shias have absolutely nothing to lose by following the teachings of Prophet Muhammad (pbuh)'s pure household. Allah will not punish us for not respecting the companions who didn't treat Ahlulabyt (as) in the best way. Our position is rational - to not respect those who didn't support Ahlulabyt (as).
Sunnis have a lot to lose, by praising certain companions who have not been on the side of Ahlulbayt (as). Their position is not based on logic, as they support their enemies, relying on guess work that everything was alright after the demise of Prophet Muhammad (pbuh). In addition, they reject Imamah which is a universal law created by Allah. In the Quran Allah says that he will raise us with the Imam of our time. What will Sunnis argue?