It is the old adage, everyone wants to get to Heaven, but no one wants to die. If one love's others no less than one loves one's self, the way will open before one. Will one really not have that last piece/bit of ..... so that another may have it?
Attachment to one's own preconceptions are very hard to let go of. Even harder to recognize the Divinity in each and every person, no matter what they have done.
Its a lot to work through, and the number who are willing to do so are rarely numerous. Still they appear regularly through out history, so the example is always there.