Trump wouldn't condemn white supremacists, tells Proud Boys 'stand back and stand by' in Biden debate

In the first presidential debate, Trump refused to condemn white supremacists and racism.

He said instead to these groups, and he shouted out the Proud Boys in particular, "Stand back and Stand by."

Is that a command to his armed base to prepare for violence after Trump loses the election?

Did he just tell white supremacists to stand back and stand by?