Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: Don't understand reason for #Muslim countries citing #terrorism as reason for not taking #refugees. Aren't #terror attacks against infidels?
This tweet contains emotions: 
disgust, fear, pessimism