Understanding what liberal ideology stands for is key for understanding why liberals are becoming an insular cult now that the ideology is in a crisis. This is precisely the point I'm making here regarding the threat of populism:

When threatened by populism, liberalism readily abandons its political ideals in favor of preserving the capitalist economic system. Liberalism ultimately serves as a mask for capitalism, concealing its exploitative nature behind a facade of individual freedom and democracy.

Liberals see both right and left wing populism, which is another term for the democratic will of the majority, as a threat to their core ideology of private ownership. Hence why liberals lash out whenever seeing sources they consider to fall outside the approved liberal Overton window.