Americans who attend religious services on a regular basis are slightly less likely to support the death penalty than those who attend less frequently. Although a majority of frequent and infrequent churchgoers support the death penalty, the data show that 65% of those who attend services weekly or nearly weekly favor capital punishment, compared with 69% of those who attend services monthly and 71% of those who seldom or never attend.
Gallup continues:
Protestants are somewhat more likely to endorse capital punishment than are Catholics and far more likely than those with no religious preference. More than 7 in 10 Protestants (71%) support the death penalty, while 66% of Catholics support it. Fifty-seven percent of those with no religious preference favor the death penalty for murder....