Answer:
“Do you think Hitler will be in Heaven?”

ASK: Now why do you think this is a good question to ask them?

ASK: How do you think they will probably answer this question if they are not Mormons? Won’t that say no Hitler will not be in heaven.

So then they have a standard that Hitler doesn’t measure up to, but other people do.

ASK: What is a followup question you might to ask them?

Answer:
“What is the standard that Hitler doesn’t measure up to, but other people do?

“Because my Bible teaches me in Matthew 5:48 that we are to be perfect like our heavenly father is perfect.  Furthermore James 2:10 says that if we stumble in one point of the law we are guilty of the whole law.”

Do you see now how asking a simple question could cause someone to reconsider whether their perspective is adequate to build their lives around?