He armed Indonesia during their genocide against East Timor.

https://web.archive.org/web/20170226181104/https://www.worldpolicy.org/projects/arms/reports/indoarms.html

Unfortunately, despite its professions of support for human rights in Indonesia, the Carter Administration picked up where Kissinger and Ford had left off. As Noam Chomsky writes in the preface to Matthew Jardine's 1995 book, East Timor: Genocide in Paradise, "In 1977, Indonesia found itself short of weapons, an indication of the scale of its attack. The Carter administration accelerated the arms flow."[7] U.S. arms sales hit $112 million in 1978, and averaged nearly $60 million per year for the four years of the Carter administration -- this was more than twice the level of weaponry supplied to the Suharto regime by the Ford Administration.