> So the supreme court will become a parliament.

It already is.

The whole notion of judicial review was from its conception a political tool.

My limited understanding of the history is that until recently (I think probably the 80s), supreme court judges were confirmed at a near unanimity. But then the supreme court decided to use the constitution as a tool to make changes that should be the realm of congress. And logically, appointment to the court became highly politicized.

The notion that the Supreme Court wasn’t political until the 1980s is an interpretation I’d rather strongly disagree with. Whether the Supreme Court was making rulings that were more properly the domain of Congress, well, that’s a matter of opinion at any point. The Dredd Scott decision, for instance, was decided on a political basis and was arguably an overstep for the Court.

>If you can take it over, the other side can too.

The Republicans already have. Remember Merrick Garland?