Probably a joke, I can't imagine anyone would say that seriously, but in poor taste. An elected councillor should know better than to joke about controversial subjects, as jeremy says. People like us, on here for example, can say something off the cuff, then say sorry, didn't mean it, joke gone too far etc, and there are no repercussions but in public life every P and Q has to be watched.
Hope I don't bump into him in Sainsbury's - I don't say that seriously because I know he wouldn't kill me - he looks average and I doubt I'd recognise him. I didn't know 'Cray Valley West' was so near, would have thought it was Bexley rather than Bromley.