Firstly, the title is a lie. They aren't suing Notch, yet.
They told him when he tried to register "Scrolls" that it conflicted with their trademark. And it does, to be honest. It's a similar title, for another game. What Notch says about thinking it should be fine because the content is different is irrelevant. Trademarks have absolutely nothing to do with content, only the words. Plus, Bethesda has to defend their trademark if they want to keep it, and that means defending it against anything even similar to it. Notch knew all of that, and still proceeded to ignore the issue, so now they're telling him once again to stop using a name so close to their trademark, or they will have to sue him.
The guy knew it was coming, had plenty of time to prevent the problem, and then complains when Bethesda actually follows through? Trying to act like the innocent party in this, when it's his own fault. I will never understand why people give so much credence to Notch, the guy's an idiot.