"All have turned away, they have together become worthless; there is no one who does good, not even one." (Rom. 3:12)
"This is what the Lord says: 'What fault did your fathers find in me, that they strayed so far from me? They followed worthless idols and became worthless themselves.'" (Jer. 2:5)
Yes, those who follow false gods of any sort have no worth, they are worthless, useless, unprofitable, Scripture says this.
God values human lives, we should too, and should indeed not be like Muslim terrorists who blow up people indiscriminately without regard for human life. For people are created in God's image, but to say there is worth apart from Christ and the presence of God, is a mistake.
"Yet you have a few people in Sardis who have not soiled their clothes. They will walk with me, dressed in white, for they are worthy" (Rev. 3:4). This would imply that those who have soiled their clothes, including unbelievers, are not.
Blessings,
Lee