Technically, we’re all “weird”.
Everyone is wired differently (how they think, how their body functions). Everyone has their own unique strengths and weaknesses (abilities, likes/dislikes). Everyone perceives and experiences things in a unique way (point of view). If everyone was wired the same, there’d be no imagination. A painting would only be paint on a canvas. Music would only be sound. Books would only contain information. But since we are wired differently, we are strange. We are abnormal. We are unusual. We are odd. We are peculiar. We are… weird. However, since we are unique individuals, no two people can ever agree 100% on everything.
Human nature says that anyone who doesn't agree with you is wrong.
People will argue, fight - even kill, just to maintain that their position is the correct one. Even if they see that their position is wrong, many will staunchly maintain that their position is right rather than lose face. Some people will close their minds rather than admit that their point of view might be wrong. Others are so opened minded that "their brains fall out". They accept everything as fact, no questions asked.
To sum up human beings in one word - weird!