It is a small but loud element on the left and right that are causing these issues. As we disenfranchise the mass in the middle we push them to the extremes.
This is very true. The funny thing is that rhetorically these two factions are nearly indistinguishable (outrage, shock, ridicule, intellectual superiority, victimhood) and feed off each other by continuously pointing out the worst actions of "the other camp". Problems in their own camp is always met with: "Yes but look at..."