interesting, so you are dividing morality into impact on immigrants and the idea that they should be allowed to join us a a moral right, with the former included in your analysis and the latter not.

putting aside positions, from a practical perspective it seems that drawing that line will remain difficult because "impact to immigrants" likely informs the very moral arguments I think you're trying to avoid. Or in other words, putting that issue (effect on immigrants) within the costs/benefits analysis requires some of the same subjective considerations that plague the moral argument (both in terms of difficulty in resolving with certainty and the idea of avoiding morality).

Regardless, seems like the horse has been dead for hours (my fault!). Thanks for engaging with me.