As his family and friends in this Philadelphia suburb began mourning Mr. Berg's death, they also struggled to sort out the complicated and still murky circumstances of his beheading. It was unclear why he was singled out in what the Islamic terrorists contended was retribution for American soldiers' abuse of Iraqi prisoners, and his family wondered whether the fact that he was Jewish played a role in the killing.
[...]
Mr. Berg was Jewish, and his father said that the terrorists who beheaded him may have known that.
"There's a better chance than not that they knew he was Jewish," Mr. Berg told The A.P. "If there was any doubt that they were going to kill him, that probably clinched it, I'm guessing."
Seems to be mostly speculation, at this point.