The "other side" here, aside from the fascists who just want to shout 'nu-uh!':
No enforcement mechanism is present in the amendment. The op-ed writer declares this means the amendment is self-enforcing, but self-enforcing is just not a thing. Enforcement would require state action -- either the individual states refusing to count his votes or send forward his electors or an act of Congress to disqualify him (for example, the Senate declaring they will not accept votes for him). Neither of those scenarios is going to happen in such a way as to sway the election. Alternately, a lawsuit that would end up at the SCOTUS who would certainly defer to Congress on the issue. Assuming you could even find someone willing to raise that lawsuit who had standing (and who even would? Joe Biden isn't going to do it).
Either way, nothing will happen. This disqualification is moot.