Hinkle seems to get along with her club teammates just fine...as well as her former college mates, etc. Are we to assume that there were no lesbians on either team? Every female soccer team in the NWSL has multiple gay players. Your daughter's club team probably has at least one or two right now. The issue isn't Hinkle's disagreement with gay marriage--something the "bigoted" Barack Obama disagreed with until late in his political career. The issue is that she was forced into that personal moral decision because US Soccer (and Nike) decided to try and make money selling politically charged Rainbow jerseys and align politically with a large portion of their fan base. (Certainly doesn't hurt that the head coach is gay and at least 7 of their players are too.)
Decisions like these reinforce the argument that the USWNT is less about being a sporting team/endeavor and more about being a PAC, just like MoveOn or CPAC. I think the US men also wore Rainbow jerseys. But I'm not aware of any other sport that has done so. Never have seen US Swimming require rainbow speedos, or US Skiing require rainbow tights, or US softball (also a high participation lesbian sport) require rainbow uniforms. So, it begs the question, why? Many sports wear pink for cancer awareness, but that's not a political hot potato. Everyone is for cancer awareness and cures. And cancer strikes everyone -- gay, straight, black, white, etc. But everyone is not gay or potentially gay. So it's not an inclusive initiative on its face. Then add the politics and it's just a confounding decision.
As I mentioned previously, Canada was, proudly, way ahead of the US and rest of the world on recognizing gay marriage and rights. Our soccer teams have never donned rainbow jerseys. Maybe we feel that our actions speak louder than a shirt with colorful numbers, and a nike logo of course.