[footfootfoot]

One of the 16 Buddhist precepts states: "Realize self and other as one; Do not elevate the self and blame others"

Having an enemy is an example of elevating the self by tearing down others. It is rooted in a fundamental misconcept of the self and other as distinct. The ego is extraordinarily powerful and cunning and will stop at nothing to assert and affirm its existence. I suspect, it has to do with survival strategy, hardwire it at the panel so you don't have to worry about replacing batteries or mice chewing through wires. The default is always ON, and on auto repair.

It takes an enormous amount of time, will, desire, and dedication to sit long enough to forget the self even for a moment, much less become adept at it and incorporate it into your everyday life.

For most practitioners (of any religion) I think we "fake it till we make it"