Well, that's obviously true. But there are Democrat dissenters, like Gabbard or Kennedy, so it's not a situation of pure polarization. And there are, of course, quite a number of corrupt Republicans, too, who in order ot support the elites will also advocate evil or stab their own people. So this problem crosses party lines.
But the underlying cause they all support is the push to extort ordinary folks through pushing a kind of global Socialism for the masses, while retaining their own riches and positions of power in the elite. They are not aiming to share their own wealth -- you can see that, by way of the simple fact that they are not doing it -- but rather to end up being "The Party," that gets to speak as "The People's Party," and thus gets to rule in the name of the masses while bilking and manipulating the masses. They fancy themselves not as politicians representing the people, but as social engineers and beneficiaries of the new arrangement. And they certainly have the backing and help of big business, the banks and the media. There's no missing that point. But they utilize the irrational emotional fervour of "social justice" advocates of various kinds to destabilize the status quo and to get a free hand in reorganizing it to their own liking.
Why this isn't perfectly obvious to everyone remains a mystery to me. If it were otherwise, then they would be sharing their wealth and distributing their power, would they not? But as it is, everyone can plainly see they're doing the opposite.