Not exactly.  People for action toward racial and civil justice had Bernie and two other minor party candidates to choose from.  Ted Cruz and many Republicans want to suppress the minority vote and are not interested in helping poor people or people of color but few went so far as Trump to encourage both racism, sexism, xenophobia and violence.  So the statement is not entirely true...of course, but it makes the point that all Trump supporters were (are) not overt white supremacists.....but they had to be tacit supporters or they could not have voted for him.