What do you think about Mexican-American soccer fans booing the U.S. team in Gold Cup?

I think it's disrespectful. I am Mexican American and I am for the U.S. Sure I love Mexico, but I wasn't born there, I'm American. My Mexican cousins (living in Mexico) were talking so much trash on facebook about how I am a sellout because I'm not going for Mexico. Sure I respect the Mexican soccer team but I'm not a fan.