This approach is burning bridges and giving up on any attempt to convince the other side. They'll still hold their views and they'll be forced into a bubble where their views are reinforced and are likely to become more extreme. Next election cycle could very well have people asking "how on earth did Trump get re-elected?" and the answer will be this style of attempted thought control.
Even worse, it's burning bridges with people in the middle and in many cases even the ones that are on your side.