Hamilton did indeed participate in some abolitionist efforts, but he was by no means fervent. Just six years before his death, he was still trading enslaved people:

One line item, dated June 28, 1798, shows that Hamilton received a $100 payment for the “term” of a “negro boy.” He had leased the boy to someone else and accepted cash for his use.

Source: The Smithsonian.

Why should we accept men who caused so much harm, who advocated for genocide, as heroes when there are people who did not? Why don’t we turn toward Black and Indigenous Americans to find new national heroes? Why stick with slavers and supporters of Indigenous genocide?