To answer the poll first, I don't pray in any meaningful sense. I don't have a practice or set aside time to pray. I do pray silently on the fly, and I address my prayer to "God", but I don't believe that to be the Christian God, nor do I even believe that the "God" I pray to exists. I don't even believe that any god can hear my prayer. My prayers are really just me hoping and thinking, but I do it in the manner of a prayer.
Maybe that doesn't count, to pray without belief. Maybe that's just talking to yourself. But it's the closest I come to praying anymore.
As for the new question, by and large I don't think all members of a religion should be judged by the actions of a few, nor do I think they are responsible.
What I do believe however, particularly (if not entirely) in the case of extremism/terrorism, is that the people of a religion (particularly religious leaders) have a duty to condemn the actions of those who cause pain and suffering in the name of their religion.
If you claim to follow a religion of peace (which all our world religions do) then you need to condemn those who manipulate the religion to destroy peace.
I think that the way to do this is to look at your religious teachings and find the areas that allow for murder and evil, and then to denounce those areas.
I know that's difficult in some religions where the entirety of a sacred text, including its contradictions and allowances for evil, are considered as gospel and unchallengable. But a religion has to grow, especially if its to teach peace and kindness and love.
If you can't do this then you can't condemn evil-doers because you continue to justify their actions.
And I think it is fair to judge the members of a religion who do justify and give room for the evil of other members.