Literally, the person has provided no context here. Which makes me wonder what were the instincts behind them making this comment.
No need to assume the worst. Perhaps he or she is genuinely curious about GC. There was nothing in the comment which can be remotely construed as racist.
Have you read the main article? It has nothing to say about green card at all - literally no mention of green card. Please stop defending folks for defending sake. The OP can step in and do it themselves.
Looks more like a baseless accusation than wondering