I was suggesting that no one else needs it explained to them either.

You'd hope so! But alas, some idiots exist. And when a title like this appears, it becomes difficult to tell if such an idiot wrote it at first glance, and more to point, a title like that tends to create more idiots (and it's also just kinda offensive). That's why it's important not to write headlines like this.

Sidenote: If you want people to not take things personally, avoid personal pronouns. "Is that something that you need explained?" → "Is that something that people need explained?" It makes a world of difference and I'm confident I've avoided several arguments that could've spawned from my own posts thanks to making that kind of change. Not foolproof, sure – we are on the internet – but it helps.