Binah: I think there’s a difference between the author of Just One Jew, and this man. Moshe didn’t go off because he thought Yiddishkeit didn’t make any sense, but to quote him, “it was just that God’s up there, and I’m down here and our paths didn’t cross.” His return wasn’t either based on research he’s done. He just decided to become frum bec he realized that it didn’t make sense for an einikel of R’ Shraga Feivel to go OTD. This man OTOH seems to be a smart individual (although his decision is awfully dumb), and he probably wants to “live the real life”. I think that as soon as the “thrill” fades, he’ll return (hopefully!).
This reminds me of a bochur who told someone I know that he wants to go OTD. She wisely answered him, “Ok. And in abt two yrs from now, there’ll be a guy at my door with long dreadlocks, three earrrings on every ear, tatooed arms etc. You’ll tell me you want to return to Yiddishkeit. Of course I’ll accept you with open arms. So why go the long way? Why wait till you come back? Stay right here!” And amazingly, he did!