Oracle are not being insane, like any other company they have a fiduciary obligation to maximise profit by any realistic means possible. They own Java, and monetising Java is potentially a very lucrative way of cashing in on the success of Android. If they're not seen to be pursuing every opportunity properly their own employment is under threat from aggrieved and out of pocket shareholders.
That depends on your definition of realistic, and the win/loss risk assessment. They own java?, where does that leave open JDK, in the court? I read somewhere : "the jury found that Android does not infringe Oracle-owned copyrights because its re-implementation of 37 Java APIs is protected by fair use".
To me neither corporation is a beacon of hope, though you have to wonder what Oracle hope to achieve. Should IP be granted for abstract concepts like API interfaces? In my view that could lead us down a very murky avenue indeeed, wouldn't you agree.