If they do that to all foreign passengers with one way tickets, then it is not racial profiling. If they do it only for middle-eastern passengers, it is profiling. I don't know about cash though. In many countries, credit cards are not popular. When I came here two years ago, I had bought a one way ticket to america with cash. I wasn't expecting to return within a year, so I did not buy a return ticket. I also did not have enough credit limit on my card to buy the international ticket. There are thousands of people like me who travel with genuine reasons with your scenario. If you think that is a high risk group, then the check should be done on everyone, including europeans, australians, asians and africans, not just middle-east asia.