It happens all the time. But most of the people who would torture a pet just for fun, don't believe in the holy spirit.
This seems rather common in questions regarding the treatment of animals.
Only if you change the word to "treatment" from torture.
It also seems rather common in questions regarding the justice of war, charging interest, donating blood, eating pork, and many more.
Only the first one is a matter that concerns others. What someone (other than you and the party you are borrowing money from) thinks is irrelevant to your transaction since they are not affected. Same as blood, pork and others.
What if an atheist thinks it is wrong to torture animals? Or own slaves?
I addressed that in my very first post. Many atheists are moral despite not believing. I have never claimed one needed to be a believer to be moral.
But that is precisely the question I am addressing. If you think of a matrix consisting of believers and non-believers, people who behave well and people who don't, you will find people occuping all squares. The same will apply regardless of the specific item of "morality" being considered.