Columnist Kathleen Parker covers the study.

• Here's another way of putting the Pew results: While a majority of older U.S. Muslims have largely assimilated, more than a few younger Muslims think suicide bombings are justified.
• While a majority of Muslims of all ages view al-Qaeda "very unfavorably" (58 percent), an alarming number seem to be ambivalent. A whopping 27 percent said they didn't know how they felt toward the terrorist organization or refused to answer the question. An immigrant population that does not recognize the enemy of its adopted country cannot be said to have assimilated.