If the rest of the civilized world joined in isolating fascist/racist America – in the same manner as it once isolated South Africa and others – perhaps, just perhaps, we could honour and repay the sacrifice of our parents and grandparents, who once gave up much more more to defeat fascism.

Yes, indeed.
Some of us have warned about fascism since the 1960's.
What happened in Vietnam and Detraoit along with Pierre Trudeau's declaration of the War Measures Act should have been more than enough for us to change our evil ways, politically, economically, and personally.
  But that was not to be. It used to be a cruel world. Now it's an evil world.