Mexico was supported by the U.S. And at that time, the then president of Mexico was pro-U.S., pro-democratic, pro-liberty, against tyranny, against dictatorships, against popery
Sounds to me like the Mexican president should have sided with the south.
"There are two things suited to humble our souls of men. And they are, first a due consideration of God, and then themselves; of God, in his greatness, glory, holiness, power, majesty, and authority: of ourselves, in our mean, abject, and sinful condition."
John Owen, Indwelling Sin In Believers