Agreed. Intelligence isn't something someone can just change. IQ despite being a faulty and flawed metric is also largely influenced through one's environment during childhood. The other things are changeable, IQ really isn't changeable in adulthood when we finally gain more control over our environment to make that change.
Its like putting down someone for where they were born, the color of thier skin, or otherwise. Saying something like "easily manipulated" or "lack of self awareness" would have conveyed the same vibe without the ignorance.
You see i did vote blue so this doesnt include me, but logically, you could make the exact opposite argument. This is what the DNC wanted by not courting people who clearly defined what it would have taken to get their vote. I dont agree with the protest voters actions, but i do agree with their principles.