Is the US still supplying ISIS?
AFAIK US is supplying arms to opposition of Bashar Assad of Syria. Which includes ISIS and other factions.
US also supplied arms and training to Taliban & Al Qaeda to fight Soviet military in Afghanistan.
US also supplied Saddam in his fight against Iran.
US still supplies Pakistan who was hiding Bin Laden for 10 years within a block of their military academy.
Do you see a pattern of foolish foreign policy here?