Biological females have not participated in formal athletics with biological males because biological males have larger skeletal and muscular advantage.  For biological females to enjoy sports, these sports must be restricted to biological females.  To permit non-biological females to participate violates the safety of biological females.  This is not anti-trans!  It is pro-woman!  

In addition, biological women should not be denied the dignity of separate spaces for dressing and bathroom needs.  A single use bathroom is not unsafe for anyone.  The refusal by those who identify as transfemale to use single use facilities has NOTHING to do with safety.  It is an assault on biological females.  Safety should be a consideration for EVERYONE, not just those who identify as trans.