I was overly leftist for a number of years with a couple of friends that were more or less the opposite. They were adamant about the holocaust being mostly all bullshit so I went to prove them wrong by finding easily proven facts about it like the gas chambers etc. Only to find I couldn't prove any of it. After that most my other leftist ideals came crashing down once I bombarded myself with enough opposing evidence and noticed the jews were a common thread though almost all of them.