For the 10th time, chants like that don't help bring about peace. If anything it's the opposite. And whilst you are right that bombing is of course far more important, I don't see what we gain by making Jews in Britain afraid to go about their daily lives.
Just like you can be mad about Kay Burley and also recognise the horror of people dying, so too others can object to widely viewed racist chants and also recognise the greater picture.