They are not refusing food aid, the Red Cross etc. have been let on all along. The US announced the Venezuelan government had no sovereignty over their border and sent "aid" trucks in, which were blocked.
Incidentally, "humanitarian aid" is how the person the USA convicted as a criminal - Elliot Abrams - sent weapons to contras in and out of Nicaragua.
Incidentally, "humanitarian aid" is how the person the USA convicted as a criminal - Elliot Abrams - sent weapons to contras in and out of Nicaragua.