It is not necessarily irrational to judge an authority figure's rightness or wrongness on a particular issue from what you know of their character. Even if, for the time being and for reasons which may be sound, they refuse to give out detailed reasons for their choice. When you are aware of strong arguments for them to choose the other way, it is an uneasy situation to be in. There has to be a time limit. Is there not room for an honest differrence of opinion as to whether that time limit has already expired or whether it can go on for a bit longer?
As to Indult masses, I thought the objection to them was not that they were bad in themselves but that they tended to weaken the position of the SSPX. A Tridentine mass celebrated with due reverence is surely always valid and legitimate, even if the celebrant has unnecessarily sought the permission of the diocesan bishop?
Dennis Whiting