I think copyright infringement is only the half of it.
Those guys' image was published without their permission. Although they were in a public place, you can't publish identifiable images of other people without permission.
Further they were defamed in the public media. They were singled out as deviates, using an image that they had given no permission to publish and which was used in violation of somebody else's copyright privilege. There is also intentional infliction of emotional distress.
On top of all that, this group, "Public Advocate of the U.S." has been designated as a hate group by the Southern Poverty Law Center. That put them on the hook for some major civil rights violations.
Then, to put a big dollop of whipped cream and a cherry on top of the whole thing, that guy, Delgaudio, the chief of this group is also the County Supervisor of Loudoun County, Virginia.
That could potentially put him afoul of some major state and federal civil rights statutes. Specifically, 42 USC, Section 1983, also known as the Civil Rights act of 1871. To paraphrase the law, anybody who, "under color of law," deprives another of his civil rights is in violation of the law.
If it can be shown that Delgaudio, even remotely, used his position as County Supervisor to further or perpetuate his actions against the plaintiffs... to use a legal term... his ass is grass!