Those people are not leftists, they are children who never grow out of their egoistic phase and are unable to see the world through any other point of view than theirs. They want it all and they don't care about other human beings, especially if those are not in their "tribe" or "family". They see life as a zero sum game where if they see someone gaining something this must mean they are loosing something else of the same value.
They need to be excluded from society and reformed if they wish to return to be a part of it. I'm not blaming them, I'm calling for their punishment and exclusion from any and all part of a just society, independent from them being lied to or not. You can be fooled only for so long if you don't want to know the truth; if you are still being fooled after decades of lies you're not being lied to, you want to be lied to and this, to me, makes you as culpable as the one telling you you his lies. Why could there be so little "reformed" maga today if this wasn't the case? (And be careful, those who today say to have understood the pain inflicted by this administration we're only able to do so because they were the recipient of such pain. Would Trump not have messed with the prices of their trinkets they would still be foaming at the mouth at his rallies)
We tried to re-educate nazis here in Europe after WW2 but, as you can see from the most recent election results, this has not bore any fruit. Nazis don't understand reason, they only understand violence and strength. The sooner you realise you have more in common with a bonobo than with a nazi the sooner you'll realise they deserve nothing but scorn, contempt and a massive dose of violence to be kept in place.