I don't see how neither side came out well, it was the Pegida/EDL lot that were fighting between themselves long after the counter demo had gone home. No one from opposing sides reached each other so no violence there. Not sure how Newcastle Unites were implicated in goings on that they were nowhere near 
As for covering faces. Unless you're comfortable with your face appearing on redwatch with possible details of your address/place of work and even pictures of your children, then it's wise to cover your face at a counter demo 