Why are India's top judges doubting each others' sanity?
bbc.com
bbc.com
In fact if you go by the definition of deep state, Indian judiciary might be cited as a good example of it. Except it's not a secret conspiracy, but a well known clusterfuck.
As for this one judge, it's likely that he is mentally unstable. It's also equally likely that there is some truth to what he is accusing the other judges of. Both those propositions need not be mutually exclusive.