Cats get a lot of flack for being evil but that's unfounded for the most part.
We'd go as far as to say the same stands for Beavis the cat here who isn't evil at all. He's just an absolute asshole of the highest order.
Unless he thinks that clearing the table is helping, but we doubt that.
In case you're wondering if this is a once off from Beavis, the answer is no. He's a recurring asshole.