Supporting Republicans got us Souter, Stevens and Kennedy. Not a track record for claiming pride, and hardly a basis upon which to assert that liberals will be "kicked out" by contiued support of Republicans. The Republicans can't even get well-qualified Presidential appointments on the bench with all the majorities you've identified. Anything you promise deserves skepticism in light of the reality of the day.
I've been trying to get people to wake up to the travesty of the judicial appointment filibusters for a long time, with considerable disappointment. Many - too many - on this forum would rather whine after the fact than write and call all their politicians (dems, pubbies, indys - all of them) at every level to exert the pressure necessary to effect real change within the judiciary. The subject has to be emphasized at every level to obtain anything close to an acceptable result.