Zero hysteria. I simply don’t respect selfishness. Yes, I complimented another poster, because his daughter expressed an appreciation for something beyond herself. You may disagree with my opinion, but don’t be a d*ck and step on a compliment. There was no need to get petty.
The issue that some don't seem to appreciate is that everyone's situation is different...I'm American born, parents American born, grandparents American born (and from 4 different nationalities), and need to go back to great-grandparents to find immigrants. For me, it's pretty clear cut as to who I'm representing, but that isn't true for all.
For those who have parents that were immigrants, spend large chunks of time in other countries, were born in other countries, it's a lot different. I think of my former next door neighbors where the parents both immigrated from China, and their daughters were born in the US. They speak primarily Chinese in their house, they girls spend time every summer in China with their grandparents, most of the parents social circle is Chinese (at their birthday party one year, the four of us in my family were the only white people there), etc. Those girls were born in the United States and have lived here their whole lives...but culturally, they identify very closely with the Chinese, and seeing them decide to represent China in the Olympics wouldn't be in any way "selfish".
International soccer has a lot of the same aspects at play...we've got guys on the US Men's team with very different backgrounds. Some born abroad but moving to the US at a young age, some moving here to play professionally and then becoming a citizen, some with what many would likely see as very loose affiliations (ie, father was American, never spent a day in the country, etc). We also face a lot of the reverse...guys born in the US and living here their whole lives, but their parents came from Mexico and they spent their whole lives rooting for Mexico and dream of representing them on the national stage, not the US.