The fact that they’re illegal immigrants. Criminals.
Highlight a few cases of said criminals being sick does not change the fact that they came here illegally and thus fall under the banner of criminals.
If you start picking and choosing who you deem to be worse criminals based on their health, status, etc., you start heading down a slippery slope. Who gets to decide these things? At the end of the day they came here illegally and knew the consequences of being caught. Does the law not apply to them now because they’re sick? Does that mean the law doesn’t apply to actual US citizens if they’re sick too?