So you have not one fossil of any common ancestor on any tree? That's what I thought.
Why would you need a single fossil to evidence common ancestry? DNA is more than enough proof.
Of course, virus insert genomes which the host then uses to produce proteins. That you confuse the insertion point of these viruses with common inheritance is understandable, but still wrong.
Why is it wrong?
Why do you think you and your siblings and/or extended family have the same ERV insertions at the same positions in your genomes? The answer is that it is due to common ancestry. We can directly observe that common ancestry produces ERV insertions at the same position (i.e. orthologous ERVs).
Except everything is made up of the same protons, neutrons and electrons. Can you explain why a deity would be required to use different codon tables for all life?
If you can't explain why a deity would be required to use the same codon table, then creationism can not explain shared codon tables. You would just as likely see different codon tables as the same one.
So if you were making life you would make everything different even though it must all survive in the same environment?
If I were omnipotent and omniscient with unlimited time and resources, it would be just as easy to start from scratch for each species as it would to copy designs from other species.
Do you think the creator deity is not omniscient, not omnipotent, limited in both time and resources, and fallible in all the ways that humans are? If find it interesting that you would project your own human frailties and limitations on the creator deity. Of course, it may make sense if the creator deity is simply something made up by us frail humans.
Commonality, the point you are overlooking. When you design different cars do you use square wheels on one, triangle wheels on the other and round wheels on the third.
Do you distribute wheels to different cars so that they fall into a nested hierarchy? No.
Life does fall into a nested hierarchy. The nested hierarchy is what evidences common ancestry, not simply having similarities.
Why would a designer use something different for every creature when what works, works?
Why couldn't a designer find an infinite number of solutions, and start from scratch for each species?
That they share commonality points to a common designer more than your belief in random processes. Random processes should produce random results in every case, not commonality. You got less of a reason to accept commonality than I do.
The non-random process of evolution and common ancestry produces a nested hierarchy, and that is exactly what we see. Intelligent designers do not force their designs into nested hierarchies.
Except if it was all random then there should be no commonality.
If common ancestry does not produce commonalities, then how do you explain the commonalities found between you and your relatives?
That nested hierarchy is your incorrect listing of infraspecific taxa in the fossil record as separate species. You are aware are you not that infraspecific taxa abound within every species?
The nested hierarchy applies to living species that even you agree are separate species.