They have to be.
For most people looking at those graphs and earlier ones, the thing that would stand out the most is that there are about twice as many economic conservatives in this country as liberals.
To win any election at all in this country, leftists have to lie about what they are. To voters, and eventually, to themselves.
I was interested to see that the social conservative/liberal graph in that article has a much narrower gap (38 to 28 percent). Maybe libertarianism is the wave of the future?