Democrats are only necessary if your goal is to maintain the illusion that America is a democracy which serves the people while maintaining the status quo.
Democrats are a net negative. What is necessary is something we don't have and haven't had, a true leftist party. The lack of that necessary party is what has led us to this current situation.
The Republicans being bad doesn't make the Democrats good. Especially when they are complicit.
Of course the German "constitution" starts off telling you to die /s