"If we were to count all of the examples MacDonald gives to demonstrate that the author of Mark used Homeric epics as literary models, they'd number around 100. Explaining all of these instances away is, as the author demonstrates, hardly possible."
That depends on how strong each example is. Otherwise, this is analogous to the political technique of mudslinging, in which 20 allegations are made against one's opponent, followed by the statement that "if only 25% of these allegations are true, that would be damning enough."
For example, one "similarity" is found in the following passage from the Odyssey, in which Odysseus returns home and attacks the suitors of his (presumed) widow:
But Odysseus aimed and shot Antinous square in the throat
and the point went stabbing clean through the soft neck and out--
and off to the side he pitched, the cup dropped from his grasp
as the shaft sank home, and the man's life-blood came spurting
out his nostrils -- thick red jets -- a sudden thrust of his foot --
he kicked away the table -- food showered across the floor,
the bread and meat soaked in a swirl of bloody filth.
The suitors burst into uproar all throughout the house
when they saw their leader down. They leapt from their seats,
milling about, desperate, scanning the stone walls --
not a shield in sight, no rugged spear to seize.
What passage in Mark does this battle scene remind you of? Most of us would say no passage in Mark is reminiscent of this scene from Homer. But the author (p. 34) cites Jesus cleansing the temple in Mark 11:15-17. Read the passage in Mark and note the enormous differences, such as Jesus not hurting anyone vs. the gore and blood in Homer, Jesus defending the spiritual integrity of the temple vs. Odysseus claiming his material rights, etc. But, both of them overturned tables! There is the big similarity. Even the same Greek word for "table" is used by both authors! Wow! What a similarity!
But, of course, if there are 100 similarities such as this one, it is too many to be a coincidence, right?