Too many people didn't understand the signals that Trump and the Project 25 crowd want to deport anyone they don't like. The criteria is broad and undefined, criminal record, illegal presence, funny looking, being a Democrat, and on and on. This is an administration that claimed 'they' were eating all the domestic pets and questions the natural-born provision of their Constitution based on the background of the parents.
As well, living in another country like the US isn't like baseball. Just because you've touched the base doesn't make you safe. If you are in the country illegally (snuck in, violated/overstayed terms of legal entry, etc.) you are, in fact, a criminal.