A Definition of Liberalism:

The main idea of Liberalism is that the individual is more important than society. A liberal decides what is right for himself - not society. It's actually a selfish position. You can imagine that there won't be much left of society after a few generations - anarchy is at the end.

Today's "Liberals" have morphed into Socialists - are dismantling Conservative Society, and are replacing it with a socialist society. Their bleeding hearts have come to the conclusion that good outcomes for people have to be forced. Whereas previous advancement in society was by merit, now it's by equality.
Liberalism is an "anything goes" society which seeks to legitimize every previously weird thing.
You want to "marry" a person of the same sex? - no problem we'll just call it a marriage!
You want get rid of somebody who is causing problems in your life - no problem just have an abortion or euthanasia.
You want to get rid of some legislation that restricts discriminates against you - no problem an activist judge will help you out and decide in your favour, not society's favour.
Absolutism (authority) is rejected, Relativism reins ("you do your thing, I'll do mine"). Today's Liberals are removing themselves from the realm of Right and Wrong, Truth and Ignorance - whereas the Classical Liberal embraced those things.

Some Liberalism Quotes from the Traditionalist Quote page:
Traditionalist - Quotations Page

The modern man says, "Let us leave all these arbitrary standards and embrace liberty." This is, logically rendered, "Let us not decide what is good, but let it be considered good not to decide it."

Chesterton, G.K. | Heretics | Page 13 | Hendrickson 2007

In a nutshell, the classical liberal venerated the morality of individual responsibility; under limited government with equal opportunity and just rules of conduct for all under a rule of law.

Gairdner, William D | The Trouble with Canada -Still | Page 139 | Key Porter 2010

If your definition of the good is only individual and temporal, then the moment those who believe in it die off, wiped out by a real or moral plague, the good has no social progeny , no social or cultural artifact, no "infrastructure" that continues beyond individual believers, no enduring roots. And without roots, there is no tree.

Gairdner, William D | The Trouble with Canada -Still | Page 154 | Key Porter 2010

How is it possible for a civilization to thrive and for a people to arrive at any consensus of the common good when the most fundamental questions of human life are to be decided solely by will of self-interested individuals without regard for the common good?

Gairdner, William D | The Trouble with Canada -Still | Page 276 | Key Porter 2010

... the essence of liberalism is private judgement...

Kirk, Russell | The Conservative Mind | Page 251 | BN Publishing 2008

The principal characteristic of Western modernity is freedom of thought and expression and the ability to express dissent.

Phillips, Melanie | The World Turned Upside Down | Page 97 | Encounter Books