Imaginary Enemies

In Pirates of the Caribbean, we sympathize with the Pirates when in reality they're the enemy. They plunder, rape, kill and do all sorts of other troublesome things. With a good enough story, our moral compass can sway which ever direction the author chooses.

The same thing is happening in real life...

The enemies are created by bad actors that have found their way into politics. They're the ones saying that Jews/Muslims/French/Russians/British... are bad people. They repeat the lies at such a grand scale, so often, that it becomes believable.

"...demonizing an dehumanizing a group can pave the way toward harming its members."

-Steven Pinker

There's always a possibility that a supposed enemy is actually evil but it's mostly a matter of perspective or gaining power; Divide to conquer is a tactic as old as civilization itself. We only ever hear one side of a story and for each fingers we point at someone, 3 more are pointing in our direction. Nazi soldiers believed themselves to be fighting for the greater good. Which side, good or evil, we're on always depends on who we're listening to but only the winning side gets to choose how they'll be remembered.