They?
Well, in this case, it's the judges telling themselves what they can and cannot do.
I agree. They are seeking to enforce ideological consistency, ensuring the removal or resignation of conservative judges (if there are any remaining).
One of the goals of our political system had been to protect the minority from the will of the majority. The deviants (am I allowed to say deviants?) and Leftists use this safeguard until they have attained a tactical local superiority, whereupon they then set aside these protections, enforcing their will without scruple. This has been especially lethal in the case of lawyers and judges, whose destructive capacity is out of all proportion to their actual numbers.