Another is his contention that "many" quasars are seen to be aligned with low redshift galaxies. A silly comment because there are literally billions of galaxies, so of course some will appear to be aligned with distant quasars. Further while "many" might like that way, "most" do not.

Arp's biggest failing, IMHO, is his reliance on 2-dimensional images to support a premise requiring three dimensions. He can say "it looks like" all he wants, but it does not change the fact that he has no other objective evidence to support his contention.

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All civilizations become either spacefaring or extinct.~ Carl Sagan ~

Humanity must rise above the Earth, to the top of the atmosphere and beyond, for only then will we fully understand the world in which we live.~Socrates, 500 B.C. ~

Let every man judge according to his own standards, by what he has himself read, not by what others tell him. ~Albert Einstein~