A burden for the unsaved
As a Christian, I was generally willing to offend people to try to save them from hell. (Whether I was willing to be offended toward the same end is another matter!)
Now, having seen the light of reason, I’m in the position of wanting to save theists from unnecessary anxiety, toil, pain, and expense in this life.
My motives are as altruistic now as they were before. I continue to love people and want what is best for them.