They seem be on a roll and acting as if there will never be any consequences they can't weather.
Please. Conservatives have spent decades attacking the media; Trump has repeatedly referred to the press as the "enemy" and "enemy of the people," including on January 6th. Conservatives would dance in the streets if CNN stopped broadcasting tomorrow, or if Joe Biden was thrown off Twitter.
What's really happening is that Big Tech doesn't want to be a party to coordinated political violence. That is, after all, why they are taking these actions.
They are well aware that there will be blowback, especially from conservatives. In fact, social media gave Trump and many others a pass, for a long time, out of concern about the consequences. This week, they finally went too far. Many of this week's actions were long overdue.
Our two party system may be ending in a way we never saw coming.
So... You're saying that Big Tech has an obligation to allow violent right-wing extremists, and seditionists who actively want to overthrow the government, to say whatever they want? Because that's why they are getting booted.
Do you really expect Amazon to shut down Fox News? Twitter to kick McConnell off?
If there is an imminent "end to our two-party system," it's because Trump has destroyed the Republican Party.
Granted, he didn't cause all of its problems. Republicans have spent decades indulging plutocrats and advocating unpopular policies, resulting in their increasing reliance on undemocratic mechanisms such as the Electoral College, disproportionate Senate, and attempts to disenfranchise voters.
Trump mostly accelerated and capitalized on the existing negative partisanship, political divisions, white grievance, racism, anti-democratic sentiment, low voter turnout in primaries, undermining of government, and right wing echo chambers to indulge his megalomaniacal narcissism.
As is so often the case with the rise of autocracies, Republicans knew that Trump was dangerous. However, they indulged him anyway, because they were terrified of the MAGA contingent abandoning them, assumed he would give them the tax cuts the plutocrats wanted, and thought they could manage him and manipulate his followers. Now, it's too late. They are too dependent upon the white supremacists, QAnon, conspiracy theorists, seditionists and others.
And let's not forget that in the past four years, Republicans have violated or abandoned most of the principles they once stood for, including but not limited to:
Federalism
Originalism
Separation of powers
Rule of law
Opposition to political violence
Independence of law enforcement
Independence of the judiciary
Democracy
Fighting against dictators and dictatorships abroad
Fiscal responsibility
Cutting spending
Minimal government
Respect for the military
Not using the government to pick winners in the free market
Free trade
Balance of powers
Not giving the Executive Branch too much power
The importance of character
Holding elected officials accountable
Preventing foreign interference in US elections
Fighting corruption
Peaceful transition of power
Putting nation over self-interest
A basic respect for the truth
Nominally, the "Republican Party" will continue to exist; the laws make it almost impossible for the party mechanisms to change. But the Republican Party is essentially over.