Well spotted, and you're absolutely correct - I was being sarcastic, and to be so on this site took an awful lot of consideration, especially as I refuse to use '/s'.
Further regarding my 'point' (dig?), I would have responded the same had the poster said '...as a German I apologize for [obvious historical things]'.
The irony that the couple are immigrants added an extra dimension.
I also refuse to tag sarcasm. Your typical computer nerd tends to be also a bit high on the autism spectrum which correlates with difficulties at identifying irony and sarcasm - which explains the downvotes even for statements which are in line with the HN mainstream (like your's). Keep the sarcasm coming!