Putting Suprema Haec on the same level as Cantate Domino is an absolute joke.
Acting like Suprema Haec is not an authoritative docuмent of the Church is a joke.
You have a warped notion of infallibility whereby a letter from the Holy Office (assuming it's authoritative, which it's not) carries the same weight as a dogmatic papal bull.
When did I say a letter from the Holy Office carries the same weight as a dogmatic papal bull?
I get you on these things over and over again but not once have you had the humility to say "Okay, you did not actually say what I accused you of."
Suprema Haec is an authoritative docuмent of the Church no matter how much you wish it weren't. If it agreed with your Feeneyite error you would be touting it from the rooftops as you do with the Pius X Catechism, when it suits your purpose, which disagrees with your error as well.
I don't pick and choose what Catholic docuмents or what part of Catholic docuмents I accept and reject based upon a warped feeneyite notion as you do.