Think of this- is it worth it promoting factionalism over this one issue? You should be worrying about taking care of the base, and especially the women. Just do what they want, and you’ll do better. Very few people want “radical communism,” or “radical socialism,” in the large-scale, while millions voted for Sanders. Just do what they want, and try to persuade them if you want. It’s a huge political fallacy to spurn your potential base like this.
There are a lot of talented men, and especially women, in the Democratic Socialists. Just do what they want and take care of them. It won’t be long before they become a target if the pro-war clan starts losing their minds. Luxembourg was arguably a factionalist.