Even bigger load of horseshit. I've never once heard someone hijack the word liberal to replace libertarian. Totally different.
If true, that means that you are not very well read. You could start with Hayek:
I use throughout the term ‘liberal’ in the original, nineteenth-century sense in which it is still current in Britain. In current American usage it often means very nearly the opposite of this. It has been part of the camouflage of leftish movements in this country, helped by muddleheadedness of many who really believe in liberty, that ‘liberal’ has come to mean the advocacy of almost every kind of government control. I am still puzzled why those in the United States who truly believe in liberty should not only have allowed the left to appropriate this almost indispensable term but should even have assisted by beginning to use it themselves as a term of opprobrium. This seems to be particularly regrettable because of the consequent tendency of many true liberals to describe themselves as conservatives.” —F.A. Hayek, in the Forward to “The Road to Serfdom” (1944)
Milton Friedman discusses this same thing in his 1963 book "Capitalism and Freedom".
If Wikipedia is more your speed, there is a good entry on "liberalism":
"Liberalism (from the Latin liberalis) is a political ideology or worldview founded on ideas of liberty and equality. Liberals espouse a wide array of views depending on their understanding of these principles, but generally liberals support ideas such as constitutionalism, liberal democracy, free and fair elections, human rights, capitalism, and the free exercise of religion."
A bit further down the page:
"Words such as liberal, liberty, libertarian, and libertine all trace their history to the Latin liber, which means "free"."
Then you might read the entry on "Classical liberalism" which, among other things says:
"Classical liberalism is a political ideology that advocates limited government, constitutionalism, rule of law, due process, individual liberties including freedom of religion, speech, press, assembly, and free markets."
"The term classical liberalism was applied in retrospect to distinguish earlier 19th-century liberalism from the newer social liberalism.
Libertarianism has been used in modern times as a substitute for the phrase "neo-classical liberalism", leading to some confusion. The identification of libertarianism with neo-classical liberalism primarily occurs in the United States, where some conservatives and right-libertarians use the term classical liberalism to describe their belief in the primacy of economic freedom and minimal government."
Plenty of links in both articles where you can learn more if you care to.
You may or may not agree with this definition of liberalism or classical liberalism. You may think that my use of the word liberal is improper. You may even think it is evil.
But to say that you have never heard of it?
Shocking for someone who wants to discuss politics not to even know the most basic terminology.
You really need get yourself better informed.
So what books are you currently reading? Perhaps I could suggest some for you?