>Also, domestic crude of mostly light, sweet crude whereas many US refineries are designed to deal with heavy, sour crude. Google is telling me 80% of the crude that goes through Hormuz is heavy, sour crude.

The US has some of the best chemists in the world; light sweet crude is easy to refine but heavy sour crude is hard, so US refineries refining light sweet would be a waste of their talents - better to export it out for newbies to refine and buy the harder-to-refine and therefore cheaper heavy sour crude. But if heavy sour becomes more expensive, then the US will switch to the easymode option in a heartbeat.

An increased cost of inputs will always hurt the entire industry, but it won't particularly hurt the US any more than anyone else, and will probably hurt them the least - especially when they have plenty of domestic shale oil that will be financially viable to extract if prices go up.