The reason they invest in the US and in the US dollar rather than Qatar is that they believe the US is safer than Qatar.
Please. Don't invest here. Don't come here. Don't buy houses here. Keep your money in Syria, Libya, Egypt or some other Middle East Hellhole.
If Trump getting elected will make Prince Folderol and his fellow sheikhs stop buying blocks of corporate America, his putative presidency begins to look dramatically more attractive. BDS. Boycott, Divest, STFU.
The Muslims in Dearborne, MI would scare the crap out of you anyway.