Lots of people like it. To the extent that it inconveniences them, they wish it were directed solely at Muslim-looking foreigners, but are willing to accept the security theater because they have a siege mentality. Similarly, there's a good number of people that call for ever more draconian enforcement of immigration laws, despite both economic costs and significant inconvenience to US citizens, Latinos in particular.

The US frankly has a bit of a security fetish; you might find this paper interesting: http://tuvalu.santafe.edu/~bowles/GarrisonAmerica2007.pdf