Many things don't make sense to you. Many of those things make sense to other people.
Why? Because everyone has different experiences to reach their conclusions.
A closed mind will never change and their is no possibility to change, nor educate .. which is why young people never want hang around old people.
Most elderly peoples mind closed years ago ... my 80yr old grandmother thinks chinese people are dodgy and dirty ... why? Because in Germany, in the 1930's (where she is still living despite her physical locale in Oz) chinese people always came out after sunset & disappeared when the sun came up .. and they were apparently, commonly homeless and often lived in the sewers and other dingy places.
I get the feeling there was alot of racial tension shortly before Hitler went on his rabid rampage. I've been dating a chinese girl for almost 4 years. My grandma looks at her funny and I was advised by my mother to tell her my partner was from Japan, where she spent 10 of the later years of her life. I doubt she's ever met/seen a Japanese person and likely couldn't tell the difference anyway, so I figure the odds are good that she'll never realise the deception. And my GF looks like a generic nutcase anyway ....
My mind is open on this matter however. She might wheedle it out one day
Thinking less of people because their opinion differs to yours suggests that perhaps your mind is less open than you believe, and that you've become the thing you despise the most.
Don't criticize people for their opinion. Criticize people that don't have any opinion .. they're they people that aren't thinking.
Any valid stance/opinion is valid because it is based on reasons that can be openly declared and debated .. and withstand the, usually loud, onslaught of closed minded opposition