There's a lot of idiocy going on. For one thing, the Republicans shouldn't be adopting policies that are impossible, unconstitutional, and basically batshit insane. The Democrats are using the SCOTUS as a crucial cause, and it's a good one for them; it's the only reason I can think of to vote for a nimrod like Obama. The GOP should be doing the same thing. Instead of making up dipshit ideas, they should just be rallying behind Ginsburg and possibly Kennedy's eventual retirements. Stupid strategy.
Secondly, it reflects very poorly on them. Their basic objection all revolves around Marbury, and the reason Marbury is so important is to prevent people from doing exactly what they all claim they'll do.
I will say that term limits don't trouble me at all. I'm not worried about senility or being out of touch, but given the partisan nature of what the court's become, I'd really like to see it getting mixed up a bit more than it does.
All in all, it just comes down to the same old bullshit. Judges are only good when they support your side, and when they think you're wrong, they're evil, corrupt, crooked, whatever. It would appear that there's no such thing as a valid and judicial interpretation of anything that the average Joe disagrees with.