For better or worse we are all cogs in a much larger system. I don't blame coal miners for global warming and I certainly don't think their opinions are more or less valid because of their occupation. I blame our government for not investing enough in clean energy and local activist groups from blocking solar panel projects because they dont like the look of panels. Ad hominem criticism are one of the weakest rhetorical points. Particularly when what we're talking about is an increase in housing units, which we can legitimately argue about merits/demerits and the attack is about...foreign policy.