A letter Sunday is typical from those who call themselves "Catholic," yet have no idea what they are talking about when it comes to matters of faith and morals in the Catholic Church.
The writer "has come to believe" what he has come to believe because he does not know the truth of Catholic teaching on marriage and has formed his opinion either by ignoring church teaching or failing to educate himself in it. This is standard operating procedure among so-called Catholics who do not know their faith, but pretend to speak for the church.
For example, nobody can "remarry." Either a couple were married or they were not. The church has the authority to declare either way; that is her bailiwick. No children born of parents married outside the church are "illegitimate." This is not Catholic teaching.
What the writer reflects is simply poor catechesis. Many have grown old and not properly received the deposit of faith. However, this is not the fault of our shepherd bishops.
The "Catechism of the Catholic Church" provides the church's teaching of these and other relevant facts.
Hilton Head Island