It's subjective to your definition largely, but yes. We fight over the most nonsensical things. We often react with emotional hysterics instead of thinking things through, we take great amusement from comedy (also known as tragedy) at the expense of others, as well as things that generally represent killing and unnecessary violence (majority of the videogame market). We think we have the right to decide what is moral and what isn't - a concept entirely subjective to each and every person - which subsequently causes us to fight each other when we're different - sometimes resulting in war. We're arguably ingenious to an extent, sure, but we're very strange, selfish beings if you look at it objectively.
I figured the words "retarded and destructive" could some that up quite well.
Just because we are sentient, or can engineer new forms of technology does not make us the greatest thing ever. We're out of touch with nature and upset balance, ecosystems, etc. for our own personal benefit and gain. Most people may not want to consciously destroy, but they're certainly willing to ignore the impact they have for the sake of maintaining convenience.