Thanks for sharing the article.
Looking at the two issues, performing an abortion and unjustly tearing children away from their families are both acts denounced the bishops. And while it’s obviously worse to crush children in utero than take them away from parents, both involve direct, material cooperation with evil.
This is different from holding “pro-choice” or pro-family-separation opinions, or even voting for legislation that upholds either one. Both are evil, per our Church, but their cooperation with evil is formal, not material.
So if clergy is willing to deny Eucharist to those engaging in formal but not material cooperation with evil - e.g. Pelosi and Biden - it would only make sense to deny it to border patrol agents, even if they pull the Eichmann Defense.
So I don’t think that likening this situation to pro-abortion rights politicians is a good analogy.
If at least one bishop is considering canonical penalties, is he suggesting that the action is a mortal sin? I’ve never heard of canonical penalties for venial ones . . .