Read this blog post and it's subsequent follow up. I have to say that the behavior of this "professor" is extremely disgusting, whether you are an atheist or not. I can't even imagine desecrating something that he owns or something that another religion would hold dear to themselves, even if I totally disagreed with it. It's sick, twisted, and in my humble opinion as an academic he should be fired from his position for bigotry and hate crimes. That being said, what should we do? Burn him? No.
Let's all pray for him and for others involved here that they have a change of heart and allow God into their lives. Ask the Lord to have mercy on him and on us all, because we all need it.