Why do people get mad over the smallest things an Facts?

I told this girl that android had to download apps just to get emojis, the only reason why I said that is bc she said iPhone have a small screen. (All phones have the same screen. It's base on what you get) an I told her a fact… Androids have to download apps to get emojis/keyboards. An one time she got mad bc this girl didn't give her the other half of a bff necklace, the reason why she didn't give it to her is bc she isn't her bff and because she isn't her best friend. So, y people get mad over facts?

I can't make sense out of the poor writing skills.