NPS removed rainbow flag from flagpole on Feb. 12. Interior guidance restricts 'non-agency flags' in 2021. Steven Love Mendez requested Pride flag prior to removal. 1,000 attendees gathered for flag re-raising. Local officials left after flag was raised. Attendee attempted to pull down U.S. flag. Jay Walker called flagpole 'for sole purpose of rainbow flag'. White House deferred comment on removal. Activists warned removal attacks transgender rights. Stonewall designated national monument in 2016