The dictionary is a liberal source?
It can be. Liberals exercise thought control over people by getting them to accept their definition of words, ideas, and thought constructs.
Think of words like "gay", "choice" or "privacy". Think of "abortion provider" replacing "abortionist". Do you visit a "podiatry provider" or "podiatrist"? An "optometry provider" or an optometrist"? Even better, the word "discriminate", which used to be thought of as a virtue, as in "She is such a good bargain hunter, she discriminates between the quality of goods offered with a very keen eye." Or how about "tolerance" which used to mean grudgingly accepting a negative for a perceived greater good, but which now means openly accepting and embracing formerly condemned persons or behaviors?
These redefinitions extend into politics too. Thus, Conservatives are not "progressive" because "progress" is defined as the implementation of the socialist-liberal agenda, while the conservative agenda is portrayed as "regressive" and "reactionary". And "freedom" has become not the ability to choose the good, but a liberty from any destraint to choose either what is right or wrong as equally valid alternatives - a definition which obviously pits freedom as contrary to law and order, rather than law and order being a service to our enjoyment of freedom. Thus repealing morals laws is portrayed as "widening personal freedom" rather than as "legalizing moral turpitude" or "causing moral confusion", as if sinking into personal degredation is anything but an enslavement to passions. And similarly, refusing to prosecute adultery is protrayed as "letting adults be free" rather than as "undermining marital contracts".
Then there are ideas constructed by liberals out of wholecloth to eliminate previously used words with widespread stigmatization. Think here of the transformation of "sodomites" into "homosexuals", and the inclusion in the latter group of celibate men who do not practice sodomy but suffer from an attraction to men, and the exclusion from the latter group of men who practice sodomy but also engage in normal sexual intercourse. Or there is the redefinition of a word such as "child", not in what it is but in what it brings to mind. A child is now a "burden" with high lifetime costs to be met, rather than a "blessing" of posterity to the parents.
Lastly, there are words liberals try to shove down the memoryhole in order to make them socially unacceptable. One might think here of "fornicator", "bastard-child", "pervert", "deviant", "sodomite", etc.
The whole process is really quite Pavloian in the conditioning people are given through the mass media to accept the liberal reworking of the language.
And Noah Webster would certaily be horrified by what is put out in his name nowadays, given his strong Chritian convictions.
Is the dictionary a liberal source? It is if written by liberals with an agenda, which the modern Webster's certainly is.