First off, Democrats are not leftists - this is literally capitalism in action, and supporting a moderate right wing party over an extremist right wing party makes sense for many businesses. Second, those claims all come from an entirely biased source - the Media Research Center is a partisan organization with an axe to grind. Actual studies by researchers don’t show the same bias.
All you’re doing here is exposing how propagandized you are.
Also, if Democrats were anywhere remotely close to being marxists, I would actually support them. Anyone claiming that Democrats are leftist marxists doesn’t legitimately understand any of the words they are using.
They protect white supremacists all the time.