A dirty secret of many Republicans is that they're pretty okay with illegal immigration as it's been in the 80s and 90s. Pseudo slave labor, deport as needed, etc. Needless to say, this seems unethical (even if the immigrants in question might be okay with it).
We have no better solution than to let our legislature fight this out. But, whatever laws they come up with need to be followed and strictly enforced. Failure to do so has led to abject misery, and it will only get worse.
You might not agree with the law, but the alternative is leading to far worse suffering. Ironically, the fentanyl crisis will probably turn the tide, rather than pedestrian ethical concerns.
(I'm quite old, so don't really have a dog in this fight, aside from a general well wish for the young.)
Being against legal immigration and implementing policies to make it more difficult to become legal (as the right has done) has lead to the enslavement of immigrant women and other sex trafficking. Being against sane and fair immigration policies is what people react to.
Everyone is against illegal immigration and child sex trafficking, but vary vastly on the solutions.