Three people were shot and wounded by the gunman, including two young girls.
The shooting in Noblesville, Indiana, happened a week after the Santa Fe High School massacre.
There is currently no federal law that explicitly protects LGBTQ people from housing discrimination.
Two birthday parties were taking place at the restaurant at the time of the explosion and children were in attendance.
Protesters gathered in front of the NFL's New York headquarters to demand it reverse its "dangerous decision violating players' first amendment rights."