The LEFT has no moral compass. Plus they know it all, and only do wonderful things, so there are always excuses for them. However, everyone else does have a moral compass, and so the LEFT holds them to their beliefs, and feels that it is doing good by showing that there is evil among the RIGHT.
However, being on the LEFT allows hypocrisy, and to the LEFT hypocrisy is a virtue. Honesty is not a requirement, nor is memory of previous events.
Golly, if I did not have a conscience, I'd really enjoy being on the LEFT.