Shooter was born female (e.g. played women's basketball in school), then transitioned later as an adult. We do not know if they completed their transition biologically.
Seems a fair question to ask, Pete.
Imo, the shooter growing up in what I can imagine is a pretty rigid, if not near Calvinist Presby home, church and school, then living the past several years in our divided, often isolated, hyper-politicized world, led to what is undoubtedly a targeted attack.
Understanding this, wondering about the effect of possible hormone treatments is reasonable imo.
Note: Wanting to understand the motive of these shootings is generally reasonable and justifiable, whether it be Dylan Roof shooting up a black church, the unhinged colorado nightclub shooter, the orlando nightclub shooter, or this person shooting up a christian school.