I'm pretty sure Labour's current policy chief is likely to find he is most closely aligned politically with Labour, not Class War.If he supports Calls War then he should join them. if he stays in Labour then he should support Labour.
Add Corbyn that seems to be supporting that behaviour, Labour is out of the running.
That is my worry as well, we need a good opposition.
In this case one called "Class War", an anarchist group.
Corbyn aide Andrew Fisher suspended by Labour Party - BBC News
What on earth is going on there?