Task: Identify the emotional nuances in the tweet, classifying it as either 'neutral or no emotion' or as one or more of the designated emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that accurately reflect the expressed sentiment.
Tweet: Earth's sixth mass extinction event under way, scientists warn **basically  caused by Islamic Muslim terrorism which Obama dem- rats back*
This tweet contains emotions: 