Simon I agree with your assessment of putting your hands over your ears. However I don't see bohm doing that here. Stating that many of trumps voters are uninformed does not negate the current problem on the left.
It is appearing to me that you are the one that is being dogmatic here. If one doesn't focus on the regressives only they are wrong, wrong, wrong, and everything else contributes to Trump being re-elected in four years. I fear this very dogmatism will continue to strengthen the regressives and keep secularist values as a minority in this country.