So here I think you're nicely highlighting the earlier point. You are more interested in defending Democrats from some imagined charge of flip-flopping all the time. That's a charge I never made. The point I was making is that there is a lot of continuity in US policy from one admin to the others. This leads voters to rationalize their support/opposition to such policies based on who's in power. If you don't see that happening, that's great.
The word continuity does not appear anywhere in your OP. The statement that voters take opposite positions depending on who is in power does.
I'm more interested in you documenting, factually with polls, countless examples of D's doing this flip-flopping. Exactly who was against Afganistan but suddenly rationalized supporting it when they learned Obama was for it?