The Ultimate Value and the signs of it in ourselves.

[Mystic]

There is no objectively right answer.  There is nothing to which you can show error.  

And like prettiness, a person's worth is a subjective judgment.  

Ok so there is no right or wrong answer regarding value. Then you say:

Except that many, many people did very much value Hitler, and that gave him great real, even awful power.  Others disagree and find him awful.  I find him awful.  But, my choice is not objective.  It is personal, and cultural, and naturally I think it's right.  But that doesn't make it inherently right in the sense that his weight at any given time is a correct number. 

Why do you think it's right if there is nothing to which you can show error (per your words)? 
This is the crux of the issue. You value of Hitler is the negative scale, in the minuses, right? But you say has none what so ever, it's determined by what people assign to him. The issue is why do people assign to him a value in the first place? You said you think your opinion of him being awful is right. Now let's discuss this, why do you think your opinion is right? And why do you have that opinion? 
I'm trying to understand. To me, it seems he is awful only because he ought to not have been like that. There is more valuable ways he ought to have lived his life and there is ways we negatively condemn (opposite to valuing or negative value) by believing it's truly negative, condemned or evil.