He’s implying immigrants commit crimes, even if they didn’t commit this specific crime, so it’s OK to make up a batshit scenario that never happened because other things do happen.
Of course, every fucking statistic out there proves that immigrants, per capita, commit less crimes than citizens. Which makes sense - why the fuck would you spend all that time and money getting here, just to commit a crime and immediately be kicked out? Are there a small percentage of immigrants involved in narcotics and gangs? Sure. Are there citizens involved in narcotics and gangs? Yes. A lot more.
“Why would I vote for a primary party candidate who supports ranked choice voting when I can just throw my vote away on a third-party candidate that will never be elected? I’ve got principles!”