There's a difference between saying "this is what would make me vote for the Democrats" and saying "Democrats should/need to do what I say if they want to win."

If you want to say a) as a non-Democrat, go for it. Everyone's entitled to their opinion. But it's not in the party's best interest to let non-members dictate how we campaign, message, etc. If you want to do that and be taken seriously, you should join the party.

Hope that clears things up