Since they are replying to a comment that thinks deportation is sickening, I think they are saying that it's sickening that someone to willfully break the law yet be immune to deportation.
This is one of the hot topic controversies in the states right now. For example, deportation is now often rebranded as "breaking up families" in the media which now makes you that bad guy to suggest it.
It seems like one should be able to be against both: breaking up families is crappy and totally not fun. We also don't want people to think breaking the law is the best/only way to support [or be with] their family!
But these problems don't have easy solutions. You can feel bad for [deporting] a model citizen who is also in a country illegally while simultaneously wanting to limit the number of people in the country illegally.
Unfortunately, all decisions in this space have [sometimes surprising] consequences. One of my most brilliant colleagues will not be staying in the US for very long because he is an only child and wants to be closer to his parents as they age [there is a provision that allows naturalized citizens to obtain green cards for their parents for exactly this purpose, but it is reeeallly slow - and he has no guarantees it won't be shut down before his parents receive green cards].
On these paradoxes and contradictions, I can't help but think of Hamilton: "The Constitution's a mess" [so it needs Amendments] "It's full of contradictions" [so is independence!]
This is one of the hot topic controversies in the states right now. For example, deportation is now often rebranded as "breaking up families" in the media which now makes you that bad guy to suggest it.