I think this proves that Supreme court justices are not aligned with any political parties. They take their roles very seriously. Kavanaugh looks to be very much a worthy Supreme Court Justice, same as Roberts who was elected by Bush (whom I hate more than Trump). I'm glad he was able to survive the ridiculous antics he went through and I think he will be a good justice regardless of what people think his allegiance was.
It really does prove it. If they were completely aligned with politics, they would have ALWAYS voted in a predictable way.
They may have more conservative or liberal tendencies, but to think that that all Justices will vote the way that people want to pigeonhole them into is ridiculous.