Undocumented immigrants take resources up. (If fact they may be uninsured and unvaccinated, too.) You should favor refusing medical care to them (and education to their children) based on this argument from resources. Do you?

Undocumented immigrants actually don’t take resources up statistically because if they did their undocumented status would be more easily uncovered, so I don’t know what you’re talking about. Trying to swap one population for another and arguing it’s the same thing, when only one population is causing the problem, isn’t logical. Please address my concerns as they are.

He (or she) isn't saying they're the same thing, they're just demonstrating that the "takes resources up" argument carries no weight whatsoever.