Yeah, like women demanding the vote or African-Americans seeking an end to Jim Crow.
This feels like cherry picking, and ignoring the mountain of good that the SCOTUS has done in terms of striking down discriminatory laws as unconstitutional. That's not to say it's perfect -- I don't think anyone has said that? -- but that, in general, it tends to work. And most SCOTUS rulings are extremely lopsided, anyway, even with a more conservative court. The fact that minorities have the ability to appeal to the judicial branch in areas of the country where they could not even think about winning at the ballot box or in the legislature is strong and important.
Yes, they're unelected. As judges should be. Yes, they have a lifetime appointment. As judges should have. And yes, they're partisan. As we all are. SCOTUS judicial review is the best possible court system for a country as large as the United States. It's not perfect. Sometimes they get it wrong. But it generally works.
I don't think it's necessarily better or worse than a Parliamentary system, but I'm happy that we have a strong judicial branch, as opposed to some other countries. I also don't really get where this "throw stones" point came from -- everyone, at this point, understands why the Irish are voting on this. It's not a criticism, just rectify an issue with Ireland's Constitution. Nations do that all the time.
Like, if we're going to criticize how the American constitution doesn't work in 2015, I would never start with the judicial branch. Our legislative branch is in serious need of reform that will never happen.