Sure, anarchism is a philosophy built on the rejection of social hierarchies. Fundamentally and historically this is far left and aligns with modern far left democrats but only to the extent that their proposed policies aim to bring into balance the social and economic disparity that emerges from unregulated capitalism. But to achieve these aims, progressives push for significant government intervention, regulation, spending, etc. This is hardly the position of the rioters in question who are supporting the abolition of government and are expressly stating their opposition to Biden and the Democratic party! You use "far left" simply to tie these violent rioters (which, by the way, democrats have never had a problem condemning) to the progressive socialist arm of the Democratic party. I guess you could try to call them left wing libertarians and then you might get closer to one type of anarchist, but that kind is not who was rioting. Bottom line, you are being disingenuous.