McCarthy didn't spy on anyone. He was a Senator not an intel agent. Additionally, McCarthy has been proven right. His estimate was that there were around 20 Soviet agents that had infiltrated the US government at the highest levels. Once the USSR fell and their documents became public it was proven they had well over 200. McCarthy was right but people still tarnish his name out of spite.

Hoover was an SOB far worse than McCarthy ever could have been but is still revered by many in the intel services. His name still adorns the FBI HQ building and other than accusations of cross dressing, no ones dug in to truly uncover the evil things that man did.