It's just easier and cheaper to refuse entry to risky people than to go chasing them down across the country when they run off. It sucks big time, but the US aren't the only ones who have these crazy immigration laws, although they do enforce them very strictly.
That, I'm sure, would be their argument. I would counter by saying that the difficulty or expense would be greatly reduced by the fact that this guy has been all over the media for at least five years and wouldn't be that hard to find. I think a every media outlet in the country would run the story and he would be found in a day. They could close his business and confiscate MemoryDealers in San Jose as a repayment for his debt to this poor nation who had to suffer through the ordeal of having a businessman running free (I couldn't even type that without laughing). You're right though, America enforces everything around the world "very strictly"