Most Americans (59%) have an unfavorable opinion of Islam, while only 18% say that they have a favorable view of the religion. Republicans (74%) have the most unfavorable view of Islam, while under-30s (32%) have the highest favorable attitudes towards Islam.

Perceptions vary greatly as to how many Muslims sympathize with ISIS and Al Qaeda. 19% of Americans believe that most Muslims sympathize with the two extremist groups, while at the opposite end of the spectrum 31% believe that less than 10% of Muslims support ISIS and Al-Qaeda. 27% say that between 10% and 50% of Muslims around the world back the two groups. Democrats are much less likely to say that significant numbers of Muslims support the two groups, with 43% of Democrats estimating that the percentage of Muslims that support ISIS and Al-Qaeda is under 10%, something only 20% of Republicans agree with.