There is no such thing as objective reality, everything has an angle of some sort, even the things you agree with
Try this simple test: Visit a mental hospital. Speak to some people with delusions. Usually,if you let people at the nearest bus pickup spot bum cigarettes they'll talk to you all day.
Keep talking to them until you meet two or more who think they are the ONE true god, or maybe God's only son. Or Napoléon.
If you can't bring yourself to accept that the both are who they believe they are, then there is an objective reality and you knew it all along.