Even the very definitions of words are tribally defined, and carry implicit values. Some (not me) could make a case that wage slavery is also morally indefensible, or that private property is a form of theft from the poor. The fact that you see no distinction between copyright and theft is a perfect example of this morality-through-definition.
To use a straw-man example: Donald Trump owns the trademark to the phrase "You're fired." Am I stealing if I repeat this phrase? Now how about Amazon's 1-click, or humming "Happy Birthday"?
A hundred years ago, you could own the copyright to a book, but not claim ownership of a phrase or obvious idea. A thousand years ago, you could not effectively claim ownership of a book. Ten thousand years ago, you (probably) could not have claimed ownership of land, at least in any form we're familiar with. These are all things we made up, for better or worse.
Regardless of any person's or tribe's specific opinions on economic issues, private property, or ownership of ideas, I think it should be implicitly obvious that breaking society's copyright rules is a different act than stealing, just as manslaughter is different from first-degree murder. It doesn't justify it, it simply acknowledges that it is a different act.
Also, this particular case is laughably mild. The creator has only benefitted by sharing this free art snippet and is now internet-famous as a result. I guarantee that Jeff would remove it if asked, and also that the creator would never think to do so, given that this image is strewn across thousands of websites.
