I can't parse what this means. Is the idea that we are to assume malice of intent to the reasons the Court does things, and that "consistency" is not a legitimate reason to argue about it? How do you know what the "true" reason is?

You don't know anyone's true reason for anything. Your specific example of abortion is a ridiculously complex topic (hence the total disagreement in society), so simplifying it to basically "the other side is secretly lying" seems unfair and uncharitable.

So I’m a card carrying Fed Soc member. While I’m uncomfortable with legalized second trimester abortion (because at that point the fetus looks like a baby) I don’t think abortion should be banned altogether. But I still think Roe was wrongly decided and properly overturned. I’d estimate that half or more of Fed Soc supports some degree of legalized abortion, but virtually all think Roe was wrongly decided. The idea that it’s all pretext is laughable.

By the way, I think liberals also believe what they say. It’s just that they believe that judges should be cultured elites sitting on a throne telling the rabble how to structure their society.