An infallibly defined teaching is now heresy?
Why is this so shocking? Even the BoDers here on CI tell us that we're heretics for believing in EENS, i.e. that if by EENS we don't understand the opposite of EENS (the true interpretation of the Church they claim), then we are heretics.
You know full well that we all believe in EENS, as all Catholics must. No one has ever accused you or anyone on here of heresy for believing EENS.
EENS is a dogma of the Faith, it is
de fide. All Catholics must believe it under pain of heresy.
Baptism of Desire is also
de fide. All Catholics must believe it under pain of heresy.
You and all like you on here profess heresy by denying Baptism of Desire.