[tallhappy]

the very high degree of homology doesn't seem to be able to explain the differences in species.

You don't know that. Nobody knows that.

I agree, which is why I wrote "doesn't seem".

Nobody really has a clue if the differences in non-coding regions have much effect at all;

No, people have clues. I linked to the Science comment article that talked about this.

[Right Wing Professor]

I agree, which is why I wrote "doesn't seem".

You fail basic logic. We don't know whether or not coding region differences are sufficient to account for all the differences between species. This does not mean that it doesn't seem that they are sufficient.