Trump's anti-Muslim rhetoric increased American hostility toward Muslims. [causal]
A comprehensive survey on Islamophobia by the Bridge Initiative at Georgetown University (where—full disclosure—I have served as a senior research fellow) found that Trump's anti-Muslim rhetoric led Americans to feel more hostility toward Muslims than any other religious group in the United States.
XREF: Connects to research on political discourse and its measurable societal effects, and to literature on scapegoating of minority groups.
XREF: Connects to broader research on elite rhetoric shaping public opinion and prejudice toward minority groups.
Arsalan Iftikhar, Fear of a Muslim Planet_ Gl…, loc. 261