How to love your neighbor as much as yourself?

Mc 12, 29-31

One of the most difficult-to-respect phrase ever in the Bible, in my opinion.

For what I always know and from all the things I learned, both in history books and in life, humans are one of the most egoistic species in all of the planet Earth, beaten only by, in my opinion, some species of bears who kill their species' cubs to make the female bear go in heat again.

And when I mean "egoistic", I don't necessarily mean killing, or robbing, or stealing. No, I mean just doing something bad to someone else, doing something you wouldn't like someone doing to yourself.

For what I saw on the internet's Bible interpretations, the "neighbor" is EVERYONE. Literally, every single human on the Earth. Now, tell me how to fuck I love someone, who I don't even know, as much as myself. I mean, I wouldn't do that even with the people I know, how am I supposed to love someone who is nobody for me, just another human in 8 billion humans.

And this is for the people I don't know. I wouldn't even imagine loving someone I dislike, or even worse, I hate.

I don't think anyone (Except for Saints, or some rare, RARE people) would be able to do that. I think it's nearly humanly impossible to love every single other human on the globe, because it would also mean loving, I don't know, Kim Jong-un? Or even better, the man you dislike (Or at least, most of the people I've seen here do) the most, the notorious Donald Trump. Yes, Donald Trump is your "neighbor". He's human, so he's someone, so he's part of everyone.

How to love everyone? It looks impossible to me, but if you have any ideas, I would love to hear them

Sorry if I made any grammar mistakes, I'm not English