I mean there is documentated evidence that Clarence has been on the take for decades so not very tin foil hat-y to assume this is happening with all of the justices
It's reasonable to be suspicious of the other justices, question their motives, investigate their finances and pass laws banning the exact kind of nonsense that Clarence Thomas has been accused of.
That said, I think it is absolutely tin foil hat-y to _assume_ that the other justices are just as bad.
