How does defending the filthy detention camps at the border as border security measures while condemning the concentration camps used during the Jewish Holocaust not imply moral relativism?

This is a question directed at those who argue that objective morality exists.

Can someone please explain to me how defending the filthy detention camps at the border as border security measures while condemning the concentration camps used during the Jewish Holocaust is NOT a secret implication that morals are relative???

Because the way I see it, immoral acts do not suddenly become moral because of people’s motives for those actions.

I’m genuinely at a loss here. What am I missing?

Context: 1. https://www.cato.org/blog/are-cbps-filthy-inhumane-immigrant-detention-camps-necessary 2. https://nymag.com/intelligencer/2019/07/the-inhumane-conditions-at-migrant-detention-camps.html 3. https://encyclopedia.ushmm.org/content/en/article/concentration-camps-1933-39