[dude with glasses in a communist t-shirt, arguing] I'm the only leftist here, your opinions are TRASH
[dude holding a theory book on smug, arguing] Read theory you losers, you're all WRONG
[dude in an anarchist hoodie, arguing] Nuh-uh, I'm the only leftist here, you're SHITLIBS
[the three dudes are now caught in a cartoon fight, glasses gone flying, punches everywhere, while a firing squad of nazis are targeting them with rifles]
[a confused nazi asks] Why… why are they still arguing?
Or Marxism and Marxist-leninist.
Say what you will about Democrats. Outside of the elected ones. Most of them don't have a strong ideology. Just actually wanting things to improve. But I'm sure of how to go about it. And when you approach them like that. Are plenty likely to be sympathetic and allies.
Not really sure what you're trying to say here as "Marxism and Marxism-Leninism." Are you saying these are antagonistic ideologies? Marxism is an umbrella, not a tendency within itself. History has progressed since Marx, and Marxist theorists since Marx have developed theory and practice accordingly. By far the largest tendency in Marxism is Marxism-Leninism, the closest to a "pure" Marxism you can get is Orthodox Marxism, which itself is ironically anti-Marxist and is overall an extreme fringe belief among Marxists.