Is it Okay for Christians to Say “RIP” Regarding the Death of an Unbeliever?

Christians responding to unbeliever’s death

***

I found a tweet by Saiko Woods on Twitter that stopped me in my tracks. I believe this tweet was in response to tweets about Whitney Houston’s daughter, Bobbi Kristina Brown, who died earlier this week:

***

***

What are your thoughts on Mr. Woods’ comment?  What theology is he talking about? How should Christians respond to the death of an unbeliever?

**