The rainbow flag symbolizes inclusion for all All are welcome regardless of sex, sexual orientation, religion, ethnicity, etc. The statement at issue is that "football is for everyone," and I checked out the jerseys. All they said was "pride" and had multi-colored numbers. When did the definitions of "everyone" and "pride" change?
The fact that the USWNT issued an invitation to her to join the team shows that the organization intended that she join in the celebration of being a united country. It's not anyone's fault that she declined it. That was her decision. If someone doesn't like the rest of us, it's their decision not to participate.