Morality is subjective. I think it's probably a toss-up on whether he should have pulled the trigger or not. I don't really care either way.

However, a massive piece of shit was removed from the gene pool. Tax dollars won't go to any of his leech-ass offspring that he would have had in the future, or their leech-ass offspring, or their leech-ass offspring. Who knows how many crimes were prevented by this piece of shit's death?