All he does is mention that they've made these connections linguistically. He doesn't cite any peer-reviewed papers on the subject. Just the book. If you click the linked text throughout that article, you'll get a few Wikipedia pages, Encyclopedia Britannica Online, and a few other web pages that don't back up his claims.
I'm having trouble taking the theory seriously when he can't seem to pull up any real evidence besides wishful thinking.
If he wants to make these claims, he needs to cite the evidence.
The conclusion might be strengthened, unaffected, weaker, or even reversed. That is the point. There is no value in new evidence other than that it might make a difference. What is difficult about this?
Older examples would generally be expected to more closely resemble whatever they came from. Is this unfamiliar reasoning?
I've wasted enough time on this. You obviously have no intention of adding any sort of evidence for this argument. Thank you for giving me a reason to read more deeply about the origins of modern alphabets, but I'll continue that reading on my own.
I do not know why you insist on arguing against something no one has suggested, or what so terrifies you about the simple idea I wrote that you are motivated to vicious accusations of "edenism", but I no longer care. You have revealed all we need to know.