Because shit like this is done so that extremist right-wing para-military groups that by law should not be able to buy guns can buy guns.
Buy guns. Defend yourself and your family from authoritarians and fascists that have a large group of Trump-appointed government officials protecting them.
All the book burning banning, LGBTQ+ oppression, the violent student protest crackdowns, the oppressive surveillence laws masqueraded as "protecting children" flying in the face of the Constitution aren't just for the luls. Each are a step in a checklist that ends in law-protected mass-murder.