You’re presenting a false equivalence, though. Just because the behavior appears similar (Democrats voting and acting as a single bloc, like the Republicans do) doesn’t mean they’re the same. If you have ten people who always agree the sky is blue and ten people who agree that it’s red, the side that insists the sky is red cannot point to their opposite group and say “See? They always vote together, just like us!” Well, of course they do, because it’s a fact (that the sky is blue). They’re definitely not behaving in the same way as the group that insists the sky is red, even though it might appear that way (all voting as a single bloc).