So, Jesus is lying in the "parable"? Why would Jesus say this if it's not true?
No it’s not a lie anymore than when Jesus said He’ll come like a thief in the night. Obviously thievery is a sin and Jesus didn’t literally mean He’s going to steal something. Or was He lying according to you?
In the same way, Abraham’s quote in the rich man and Lazarus reveals a spiritual truth through the story.