Re: Questions which should be left to the end.
This does seem illogical, perhaps paradoxical. Lots of paradox in this book so not too surprising. But perhaps its not completely illogical. They are police and they are looking for anarchists, it is their mission as police to bust the anarchists and the more potentially violent the better, so they see and, oddly enough, support their enemy because their enemy justifies themselves, reinforces who they are and why they are there. If there were no true anarchists (and Gregory despite his bluster speaks in a very pacifist way so he doesn't appear to be a true anarchist) then there is no need for police. Syme fits the bill as an anarchist and they elect him. Also, the big target in this police investigation is not this local anarchist group but the Council of Anarchists and perhaps Syme is a more credible representative on that Council than Gregory.