Heresy is directly against the infallibility of the Church teaching and indirectly against the dogma defined. If a person denies a dogma without knowing it has been infallibly defined by the Church, they are not guilty of heresy. They would be in material heresy only.
Those who were raised in a Protestant sect and are invincibly ignorant that the Catholic Church is the true Church, are usually in material heresy only.
Since material heresy is not incompatible with the virtue of faith, it is not a direct obstacle to salvation.
John Paul II already answered for kissing the Koran, just as you will soon answer for having publicly defected from the Catholic Church, outside of which there is no salvation.
Pax, you are one heartbeat away from an eternity of suffering that you cannot even imagine.
I do not, and have never, intended to defect from the Church, of whom I will always be a member. I remain a member because canon law does not recognize defections as legit, from those who do not intend to defect. At worst, i'm a material heretic, for I do not intend to deny any dogmas, nor do I formally.
You haven't explained the denial, you've just hurled uncharitable accusations, which is not consistent with V2's treatment of those "not in full communion" because V2 said to treat me (and others) in this way --
Recognize Brothers "The Catholics segregate themselves with love for their separated brethren with a charity that desires and works actively to overcome in truth whatever divides them" (Unitatis Redintegratio #3)
** Honor common bonds:** Those who believe in Christ and have been properly baptized are "put in some, though imperfect, communion with the Catholic Church" (Lumen Gentium #15).
Listen and learn: "The style and method of the Catholic expression should in no way be used as a barrier to dialogue. It is, of course, essential that the doctrine be clearly presented in its entirety. Nothing is so foreign to the spirit of ecuмenism as a false irenicism [compromise] in which the purity of Catholic doctrine suffers injury" (Unitatis Redintegratio #11).
Value elements of truth: "The written word of God; the life of grace; faith, hope and charity, with the other interior gifts of the Holy Spirit... can exist outside the visible boundaries of the Catholic Church" (Unitatis Redintegratio #3