Carrying out violent acts in the name of Islam is strongly rejected by Muslims around the world, according to the survey.
While a majority of Muslims, according to Pew, in all countries surveyed said "suicide bombing in defense of Islam" was rarely or never justified, "there are some countries in which substantial minorities think violence against civilians is at least sometimes justified."
For example, in the Palestinian territories, 40% of Muslims said suicide bombing was often or sometime justified. In Afghanistan that number was 39% and in Egypt that number was 29%.
Despite most country's disapproval of violence in the name of Islam, religious extremism -- and in particular Muslim extremism -- is a concern for a majority of Muslims in the world, according to the survey.
"At least half of Muslims in 22 of the 36 countries where the question was asked say they are at least somewhat concerned about religious extremist groups in their country," the report reads. "In most countries, Muslims are much more worried about Islamic extremists than Christian extremists."
Concern over Muslims extremism was at it highest in Indonesia, Iraq and Guinea Bissau, where over 45% of Muslims said they were either very or somewhat concerned about violence in the name of Islam.