I think the only positive that could come out of this shocking act is for it to be very very widely publicised - I thinking a lot of people have no idea about the level of violence underlying the trans rights movement, and believe the 'both sides as bad as each other' thing.
Keep sharing links, beyond this board!
Re terrorism: other rights groups turned to violence after their decades, centuries even, of calm parliamentary arguments, peaceful demonstrations etc. were met with batons and bullets.
TRAs have short-circuited that and gone straight to violence.