Yes he's a nice chap with a nice beard, but silliness (principled though it might be) like refusing to sing the national anthem is not going to endear him to more than a small minority of the population.
www.bbc.co.uk/news/uk-politics-34263447
And the signs are that he intends to be the gift that keeps on giving, in terms of pointless gestures that don't really achieve anything but make him a mega-target for the right-wing press.
Either he gets turfed out before the next GE, or he surpasses Michael Foot as the biggest loser in Labour's history.