If he had an ANTIFA flag or this anarchist flag, then I would concede that he is left wing.
Instead he has the shitty graffiti anarchist symbol used by chuds and comrades alike.
Hmm a lot of pages have actually been taken down with those. I found this one though
https://www.amazon.com/Flag-Anarchist-symbol-anarchy-outdoor/dp/B01GUXQMB6
And this one too
https://www.amazon.com/Anti-Facist-Action-Flag-150cm-90cm/dp/B07655NTQT
And not only that, it recommends alot of thin blue line and Confederate shit like you said. There is some of MAGA and transphobic shit that pop up when you search for trans pride stuff too
You can still get these beauties. LOL https://www.amazon.com/Flag-Anarchist-symbol-anarchy-outdoor/dp/B01GUXQMB6/ref=sr_1_3?ie=UTF8&qid=1488217793&sr=8-3&keywords=anarchy+flag