You can disagree with their decision whilst still empathising with their reasons. Indeed you must, if you're ever going to persuade anyone to change their position.

Though you're poisoning the discussion by invoking cannibalism, it's easy to see that in primitive societies where it was accepted, it was due to a need for safety (from hunger) and love (from participating a communal ritual). Of course we find it abhorrent now, I certainly do. But I can understand why it would have been acceptable to people in a time and place where there seemed no alternative.

Equally, we would all hope and expect that where others find our opinions and actions abhorrent (and in a huge and diverse world, someone always will), that they will seek understanding before abusing or marginalising us.

> PS: Some people really don't care about safety others don't care about love.

When I've actually dug deeply into that question, I've never found it to be true. The people who, on the surface, seem not to care about being loved, actually turn out to be the ones who crave it the most. Just look into the life story of any psychopath or tyrant, and you'll inevitably find stories of abuse and/or emotional neglect in childhood.

In terms of trump voters, I don't care about their reasons. And I am not trying to convince them. They made the world significantly less safe, putting literally billions of people at risk. That's just not cool, still as a well off person I don't need to care it's probably not going to get me killed.

As to love, some people flat out can't feel pain. Some, have more than one set of DNA. That's just 2 examples, but humans have a lot more variety than most people think about. Being an outlier and being famous are really separate things.

Sure, but people did it because they perceived it to be in their interests. Because that's what evolution ensures people do. Always.

> I don't care about their reasons

Well yes, we've established that.

Humanity has many systems of tricking people to do various things harming their own self interest, but saying what people believe has any inherent value is a huge mistake. Trump getting elected is going to kill many (though hopefully a small percentage) of his supporters, but many of them don't see a problem with this.

Trying to be a hero running into a hail of bullets it stupid. But, hundreds of millions of young men have repeatedly done so. Watching a war movie most people cheer such stupidity on as a good thing continuing this cycle.

PS: Many people hate this but even a single counter example absolutely disproves what you say. Yet, convicting people to believe lies has long had value to a great many people, so pointing this out is generally a waste of time. People even react negatively to the truth note all the down votes for polite on topic responses.