Apparently you don't know the difference between fact and opinion. Those are hard cold facts. Everytime we've tried to expand freedom and liberty in this nation it has been vehemently opposed by conservatives. Fact, not opinion.
What you are doing is taking a monolithic definition of "conservative" and "liberal" and then, transposing this over a broad spectrum of liberal social changes, to present a picture of conservatives always being opposed. The fact that conservatives have always opposed liberal policies, just confirms there is a difference between conservative and liberal. Now, if every single aspect of our history and greatness as a nation, was the result of nothing but liberal policies, specifically, liberal social policy, then you may have some kind of a point here, but that is not the case. It's just that liberal social policies are the most important aspect to you, a liberal. You conveniently forget to mention the thousands of times we completely ignored liberals entirely, and followed the conservative policy, where the liberal policy would have resulted in our demise as a nation, had we followed it.
We would have never declared independence from England, for one thing. Liberals, in today's form, would have argued that we needed to pay HIGHER taxes to England, especially "the rich." We would have never built a transcontinental railroad, because today's liberal wouldn't have stood for it, all those capitalists making profits off the labor of poor Chinamen....no, there would have needed to be a labor union to negotiate wages and benefits, and the cost of building a railroad under those conditions would have rendered it impossible to do. Liberals would have argued it was the Government's place to build the railroad, and it wouldn't be fair to only have it travel to certain cities and only east and west, too many poor unfortunate people who wouldn't have access to the railroad, and liberals wouldn't have stood for that. Then there is the War of 1812 we would have never won, because the only way we were able to win, was by securing the services of the French Navy, in return for cheap cotton. Cotton wouldn't have been cheap under Liberal policies, because, no slaves. If by some miracle we made it through that war, there are the dozens of other wars we would have never fought. We wouldn't have a Texas or California, or much in between, because Liberals would have never fought for land that didn't belong to them. We would also not have a Florida, and most of the midwest would still be covered in Indians. Had we followed "liberal" policy, if we even existed at all today, we'd likely be 13 totally dependent British colonies on the East coast of North America, and nothing more. In fact, we wouldn't have even had 13... several of those states existed for the sole purpose of growing and raising cotton and tobacco, which would not have existed in a Liberal world.
So you can see how the application of a monolith works here, and it's patently stupid. We don't live in a monolith, where only one side is valid. Most every human being has views which span from liberal to conservative, if you think about it. Now think about it! As "liberal" as you are, I bet that your viewpoint is quite "conservative" when it comes to who can have sex with your wife. I am as "conservative" as can be, but when it comes to doing things in my community to help people in need, I am a bleeding heart liberal in every way. And everyone is not like you or me, everyone is different, and have different varying conservative and liberal views on various things. The REAL problem here is, the application of labels and the assumptions of stereotypes applied to those labels.
You have a problem with this, as do MANY liberals. You want to sit there and label people... "conservative" or "like me!" Two boxes, and you put people in one or the other, based on your assumptions and stereotypes and the labels you've applied. While this is fantastic for social interaction, it is not conducive with progress. In order to have progress, you have to remove people from boxes and reason out all the ideas, working toward a common goal or solution to problems. You have to respect that everyone isn't liberal, that some people are conservative in their views, and they are part of the discussion too. You can't do this when you've put them in a box, and only value the opinions of those in your own box. This is certainly not a "liberal" approach, it's very "fascist" as a matter of fact.