Trump railing on the deplorables comment is relying on his base and others not understanding math. Even with the most absurd over inflation of Trump supporters, say 50% of the entire country is in the Trump camp (clearly not), you start with a maximum of 25% of the country being in the deplorable basket. This is obviously not even close to reality, so when you split the actual population of self proclaimed Trump supporters in half, the deplorable basket would only account for a small percentage of voters. You know, but nothing as crazy like insulting entire religions, races, and genders like some other candidate has done his entire life.
The deplorables comment is a perfect example of how democrats boxed themselves out of shit talking ages ago and GOP capitalized on it and will never relent. Because dems are "the PC party" as soon as they say something offensive, their base revolts and the GOP pounces on it saying, "oh look at that, the party that apparently cares about everyone is talking shit about someone!" They lose on both fronts. GOP talks shit, dems can only say, "hey look, they are being shitty...again" and no one in the GOP base gives a shit, and if anything see it as a form of strength and "straight talk." Even before this election, the GOP and dems compete in the same sport, but are not on the same playing field.