Cause for alarm?

Despite the positive title of the recent Pew study on American Muslims, "Middle Class and Mostly Mainstream", I found some responses considerably alarming.

When asked about who was responsible for carrying out the 9/11 attacks, 28% said it was not Arabs, and 32% said they did not know or refused to answer.

When asked, "Can suicide bombing of civilian targets to defend Islam be justified?" 8% said often/sometimes, 5% responded rarely and 9% did not know or refused to answer. That makes 22% of respondents who did not have a strongly negative response to suicde bombings targeting civilians.

Certainly these are low percentages, and the majority of respondents gave more "mainstream" responses. However, I find it alarming to hear of anyone in our country who can justify suicide bombing, let alone 14% who feel this way. I also find myself curious about the non-responders in this survey. I can understand someone not having an opinion on an elected official, but suicide bombing seems likes a topic everyone should be able to respond to.

When asked about al Qaeda, 15% had a favorable or somewhat unfavorable response, with don't know/refused to answer coming in at a whopping 27%.

Also of interest, the study asked respondents if they thought Government should do more to protect morality in society (59% thought it should) but since many Christians would feel the same way, I think a more pertinent and revealing question would center around the role of Islamic law in our society.

Certainly there were encouraging numbers in here, and granted the U.S. appears to be in the best shape (Great Britain is in the worst) but I still find myself alarmed...And I wonder if the FBI has the addresses for those who thought suicide bombing was justifiable.