> Intentionally taking these images out of context, and posting them like mugshots and calling them all insurrectionists?

The site doesn’t do that, and explicitly links the source video for each face.

> I hope any one of the many peaceful protesters captured in those images files a lawsuit for libel.

If they are the party that actually filmed it, they’d be better off suing for copyright violations (though a fair use defense may well exist), as this clearly isn’t even approximately libel.