1. Noble, voluntarily accepted prohibition upon purchasing consumer goods or indulging in professional transactions that profit regimes with poor human rights records. Allows Democrats to ethically register their objection to injustice.
2. Suspicious act of racist aggression proposed by the grievance-mongering Far Left to single out Democrats. Allows fascists to unethically register their obsessive hatred.
A proposed boycott of a civilised nation raises all manner of serious ethical and philosophical questions, e.g.: if a useful idiot proposes a boycott when there is nobody around to hear it, is it still anti-semitic?
Further reading - Fallout: The Joy of Sectarianism, by Andrew Anthony.