Liberalism is the ideology of liberty or freedom, but what is freedom? To define freedom is to limit it, but the very notion of freedom is the exact opposite of limits. Therefore, freedom for it to be true freedom cannot have any definition. But, then, that means that freedom is nothing, and, therefore, Liberalism is an ideology of nothing.
In other words, if freedom means anything, then it can only mean nothing.
Liberalism, therefore, is as nonsensical as the Liar's Paradox.
Of course, one has the very same problem with God...