"After the Unite the Right rally in Charlottesville, Va., in 2017, national attention focused on extreme right-wing groups in the country. Some groups retreated from public view and became more active online, but the groups never went away, said Joshua Fisher-Birch, a researcher with the Counter Extremism Project, a think tank with offices in New York and Berlin.

Now, some extremists are hoping to take advantage of the growing popular support for  policies like mass deportation, even if many remain deeply suspicious of the government, Mr. Fisher-Birch said. But even within the universe of radical groups, Blood Tribe is an outlier, he added."