The presentation investigates hostility toward mosques and Muslim Americans in the United States, both through physical attacks and subtle racism. I challenge existing theories related to outgroup contact and threat, against the theory of outgroup institutional context. I postulate that outgroup related buildings and developments such as mosques are seen by some residents as threatening footholds in their community. To test my theory, I developed a Cooperative Congressional Elections Study module on Muslims and mosques in 2018, created a series of datasets which scrape online information on hate crime, and utilized U.S. Internal Revenue Service data to determine the locations of mosques throughout the country. I find that the presence of mosques is significantly related to increases in hate targeting Muslims, whereas the relative size of Muslim populations is not.