Simplify the following text for a Grade 12 native English-speaking person.
Original: The overwhelming majority of Syrian immigrants to the US from 1880 to 1960 were Christian ; a minority were Jewish , whereas Muslim Syrians arrived in the United States chiefly after 1965 .
Simplified: Most of the Syrian immigrants to the US from 1880 to 1960 were Christian ; a small minority were Jewish , Muslim Syrians arrived in the United States mostly after 1965 .