You are oversymplifying this, your problem is you are centering this in the US, and you wrongly believe Republicans are spot on, this is not so, they are just as guilty as any other political party in the world all of them put their own interests before those of the people they supposedly represent, in their heads all that matters is power for themselves. That is why I tell you they are beating the crap out of us because we are seeing the enemy as friends, every politician is your enemy regardless of who he or she is. For example you right there state that half of the population of your country is deluded, problem is the other half thinks exactly the same thing about you, and the funny thing is both sides are deluded.
And this is happening all over the world, in Europe, Asia, Africa everywhere.
Take Brexit, what did it achieve, I'll tell you what, a division so deep in British society that probably it will take decades to cool down, and this over a referendum which right now no one really knows what it was about.