IMO, "religious bigotry" is not applicable. Keep in mind that there are well-known Americans who converted to Islam, like Muhammad Ali and Kareem Abdul Jabar, both of whom are respected.
Abdul Jabbar and Ali had joined the Nation of Islam which developed in the '30s through the work of an African-American named Robert Poole. Poole believed that black slaves from Africa had been born Muslim. Poole believed that Christianity was an error foisted on them by their white masters.
No doubt bigotry exists, but not limited to Muslims, but between some followers of other faiths, If not bigotry, then suspicion. Some feared the Catholicism of JFK. Some are suspicious of any religion.
The terrorist acts have been committed by those who claim to be Muslims. Yet, the US has not confined them and their families as it did to the Japanese. Perhaps the realization has come that each individual is responsible for his/her own actions.
Nobody likes to have unfair advantage taken of their good will.. Those homeowners apparently accepted people as they seemed. In general, it is easy to feel ones trust has been violated when a person has taken full advantage of and prospered by living here, been educated here, while planning to either kill or aid others to kill a "non-believer" or as many Americans as possible. It is especially disturbing when that person has taken the Oath of Citizenship.
I am aware that there are ignorant nuts who have made some of our Muslim citizens feel threatened. But there are ignorant nuts, druggies, and criminals who have made us all feel threatened.
Mosques have been built all over this country. The faithful are free to worship, celebrate their holidays, follow their food requirements. Like all of us, they live under our laws.
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