Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: So they #threaten to kill #kapernick for KNEELING. I say every athlete just stop playing until social justice and equality comes forth.
This tweet contains emotions: 
anger, disgust, fear