I’ll rephrase my question.
“So you support punishing people whose relatives committ crimes?”
Make you feel better?
“So you support punishing people whose relatives committ crimes?”
Yes. If they too are in the country illegally and if deportation comprises “punishment.” As a practical matter, yours is still a DREAM act argument—don’t punish kids. Changing “kids” to “relatives” doesn’t change the substance of the argument.