The march and rally come one week after racially motivated protests in Charlottesville, Virginia, turned deadly.
A so-called "free speech" rally in Boston on Saturday is expected to draw some of the same white supremacist groups that participated in the violent events of Charlottesville last weekend. A woman was killed at that Unite the Right rally, and scores of others were injured, when a auto plowed into counter-demonstrators.
The Boston Free Speech Coalition, the group that organized Saturday's rally, had until recently planned to include speakers with ties to white nationalism.
"Looks like many anti-police agitators in Boston", Trump tweeted about two hours after the largely peaceful rally and march there ended.
More anti-racism protesters, led by the local Black Lives Matter chapter, marched through Boston Saturday from the Reggie Lewis Track and Athletic Center to join the counter demonstration at Boston Common.
Some carried signs with messages such as "No Trump".
Near the entrance to the rally, counterprotesters chanted, "No fascists, no KKK, no racist US".
Boston's police service were prepared following the violence in Charlottesville just last week.
While Boston has a reputation as one of the nation's most liberal cities, it also has a history of racist outbursts, most notably riots against the desegregation of schools in the 1970s. The Austin American-Statesmen reported organizers for the Rally Against White Supremacy estimated about 1,200 people were in attendance. The event included a moment of silence for victims of hate. Meanwhile, supporters of the Confederate monuments are also organizing, with rallies being planned in Hot Springs, Ark. "Love, not hate. We stand together against intolerance".
Compared to the "Free Speech Rally" - which garnered roughly 50 attendees, according to The Boston Globe - the counterprotests rapidly overtook the city. "We will not tolerate any misbehavior, violence or vandalism whatsoever", Evans said.
John Medlar, an organizer of the rally, told the Herald he would "immediately denounce" anyone touting swastikas or doing a "Hitler salute", and won't let the free speech event be "hijacked by the KKK".
Eastern time. Events are also scheduled in Atlanta and Dallas. Alt-right figure Mike Cernovich wrote that "principles are nice and all but people are apes, and in the end numbers, visuals, and optics control". Others held a banner reading: "SMASH WHITE SUPREMACY".
The city of Boston has issued an advisory, urging citizens to abstain from visiting Boston Common during the rallies, stating that "large crowds" were expected to attend them. The story is developing and will be updated throughout the day.