Essentially what he's saying is that once the court has ruled on something, even if that ruling is clearly wrong and unconstitutional, it can never be changed.
By that reasoning slavery should still be legal because the Supreme Court ruled that it was in the Dredd Scott decision.
Only God is infallible, and the Pope in limited circumstances because Jesus is protecting him, but Roberts is saying that he can't make a mistake so essentially he's claiming infallibility and godhood for himself and his leftist cronies.
We see this in the Court saying that Trump's pen can't undo what Obama's pen has writ.
In Robert's mind leftists positions are irreversible but conservative ones are easily overturned.
After all abortion and gay sex where both viewed as criminal for over a century but Roberts has no problem with the Court overturning those positions.
It's clear that Roberts is just another leftists who views himself as our dictator who can impose on we the people any rule he and his 4 even more dishonest colleagues like.
That Democrats cheer this shows that they too are tyrants at heart. They don't care how their will is imposed on the people they only care that we the people are forced to live how Democrats want us to live.
What makes this even more appalling is that Roberts says he is a Catholic. The Church unambiguously teaches what science teaches; that abortion is the killing of an innocent human being.
Science is clear; human life begins at conception and every abortion kills a human being:
“[The zygote], formed by the union of an oocyte and a sperm, is the beginning of a new human being.”
Keith L. Moore, Before We Are Born: Essentials of Embryology, 7th edition 2008 p 2
“Although life is a continuous process, fertilization… is a critical landmark because, under ordinary circumstances, a new genetically distinct human organism is formed when the chromosomes of the male and female pronuclei blend in the oocyte.”
Ronan O’Rahilly and Fabiola Miller, Human Embryology and Teratology, 3rd edition. New York: Wiley-Liss, 2001. p. 8.
“[All] organisms, however large and complex they might be as full grown, begin life as a single cell. This is true for the human being, for instance, who begins life as a fertilized ovum.”
Dr. Morris Krieger “The Human Reproductive System” p 88 (1969) Sterling Pub. Co
Roberts rejecting rules that save women's lives in order to protect abortion is like a Jew defending the Holocaust.