Off the top of your head you might think a conservative is a racist, sexist, bigoted, homophobe. The liberal is a thoughtless child that simply has feelings about issues but never thinks the issues through. The liberal is a helpless victim of life.
I will explain one significant difference that controls the way they both conduct themselves. Conservatives accept the premise that we as humans lack perfection. We all are fallible and will make mistakes. Since we are human and therefore imperfect we understand not all the answers are known to us. We do not know what is best for everyone else. Conservatives are humbled by this understanding, and for the most part refrain from making judgments of what others should do, or how they should live their lives.
The liberal is an elitist much smarter than anyone else. They are infallible operating almost at a divine level. The liberal knows how you should relate to your environment. They know how you should interact with your ecosystem. They know how to eliminate global warming. They know how to save the planet. They know how you should care for your resources. They know what you should and shouldn't eat. They know what kind of health care you should have. They know how much exercise you need. They know you shouldn't eat hot dogs. They know you shouldn't own a gun. They know you shouldn't drive an SUV. They know what kind of car you should drive. They know what manner of fuel you should utilize in your car. They know you shouldn't acknowledge GOD in public (Christians only). They know you should support single motherhood, homosexuality, and abortion. They know your kids should go to public school (no alternatives) whether they get a quality education or not. They know you pollute the air when you breathe. They know you are destroying the planet when you use plastic bags, plastic water bottles and aluminum cans. They know you are abusive to animals. They know how you should raise your kids. They know what kind of appliances you should have inside your house. They know that socialism is right for you. They know that you do not pay enough taxes (you not just the rich). They know we evolved from pond slime. They know there is no GOD. They know they are superior to you. They know how much you should earn. They know you can't take care of yourself, but the government can. Ultimately they know what kind of light bulb you should use. They know everything!
Take three minutes I bet you can think of twelve more instances in which "Liberals Know Best".
A. C. Smithson