I think Jesus put it quite well.
"Give to Caeser what is Caeser's, and to God what is God's."
If the government enacts an immigration plan to cut down on illegal immigration, then that is the business of Caeser.
not a valid argument, scripturally. In scriptures, all secular laws except denying God were to be obeyed.
I challenge you to find scripture to the contrary.
Whether is was Jesus Himself or Paul writing to the Romans or the Hebres or the Corinthians, clearly Christians are called to righteousness - and righteousness includes LEGAL civil deportment.