I don't know what his argument is, so why don't you post it? Secondly, I suppose he will be saying that Pope St Pius X didn't know what he was doing, when he allowed excommunicated persons to be elected? That's the only conclusion. That St Pius X, who was surrounded by Modernists, didn't understand that the very changes he made to the election laws would allow such Modernists to be elected. He must have been the dumbest pope ever.
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Fr Cekada can argue all he wants that it doesn't apply to V2 popes. But this dodges the question of WHY would St Pius X (and XII) make such changes to begin with? What was the point? Anyone who is unbiased, and who knows history, can readily see why they changed this law.