I understand that the catechism of the Catholic church is the authoritative teaching of the ordinaries of the church, and ultimately that of the Pope. However, it is a complex and voluminous body of statements, so inevitably I can see how some persons might find arguments to one thing or another in it. I am wondering what the doctrinal position is with regards to dissent from the catechism on minor points. In the English version of the current catechism, the prologue only says that the catechism serves as a "reference" for teaching and does not make clear if it is sinful (if at all) to dissent.
For example, in the catechism it teaches the (Old Testament) commandment to honor one's father and mother, and concludes that it is a grave sin to fail to do so (thus preventing Communion). However, this commandment (which is not even a commandment of the Covenant) is contradicted by both the statements and actions of Jesus who said, "I have come to set a man against his father" (Matthew 10:35) and furthermore when his own mother came to see Him, he said "Who is My mother, and who are My brothers?" Pointing to His disciples, He said, “Here are My mother and My brothers." (Matthew 12:48). So, on this basis one could argue that is cannot be a grave sin (among Christians) to dishonor a parent, since Jesus Himself did so. [Please do not start an argument about this; the question is not about this point and it is just given as a hypothetical example of minor dissent.]
What is the position of the Catholic Church on this kind of reasoned dissent? My general impression is that if the dissent is specious or obviously just convenient, then the Church considers it invalid and the dissenter to be unqualified for Communion if they commit the sin in question, but if the dissent is reasoned and not self-interested then it is tolerated, and the parishioner can still receive communion. However, it is not really clear to me if this is the case or not.
Note that I am only asking about dissent on minor points, like the long list of grave and venial sins (of which there are dozens if not hundreds), not on major points such as the Credo and the Sacraments, which obviously cannot be dissented from without losing access to Communion.