If they're just ignoring and not actively defending, I'd think a little about all the horrors that you yourself ignore. We have a habit, as a society, of picking and choosing an ever rotating array of set of issues to demonstrate our moral rectitude. The natural world is built on predation and suffering, overpopulation and famine; and capitalism triply so. Truly accepting and acknowledging the daily constant terrors of this Earth is having tea with Cthulhu--it would drive anyone mad.

You can be friendly and not be a friend.

Should someone? You make it sound like that's all they are and all you are. Presumably, your friendship isn't built on geopolitics, and frankly about 80% of the country gives about 1% of a fuck what happens in the Middle East, and not even that much if it doesn't affect oil prices. Those things gain far away and there's a good chance your friend has many more immanent problems closer to home to worry about.

That being said, of course you can decide you can't stand people who stand by and do nothing. It's a genocide for fucks sake, and all that it's necessary for evil to win is for good men to do nothing — so standing back and letting it happen is evil.

Reality generally lands between those two extremes. You have to decide for yourself whether your friendship is at stake over this.

No. But it's important to remember a person can be immature, ignorant, propagandised or straight up stupid so, if you have the patience for it, one should try to explain some basic truths of the world and wait for their reply before dismissing them entirely.

Yes. You should be friendly to most and Realpolitik comes for us all. And you gotta keep on living. Cannot do that while simmering in rage.

Also your perspective may be warped considering the radical and extreme view points on here.

Also sometimes e.g. Ukraine is painted as a rogue state by Russians. People falling victim to propaganda usually aren't convinced by being a passive aggressive knob head.

I have family with no moral compass. This question keeps me up at night.

no. it sucks finding out that people you've been friends with for a long time have these views, but indifference to crimes this abhorrent is effectively the same as supporting them.