I just don't think it was done well.
It was done a hell of a lot better than painting two guys half-white and half-black, that much is certain.
The guys making these movies now sure don't have anything to fear from comparison to most of oldTrek.
I don't think "Let that be your last Battlefield" was childish, if you are suggesting that. Because it is supposed to show the absurdity of the argument, by doing something simple. If you think it's dated in terms of make-up, it was a shoestring budget and 45 years ago.
JJ-Trek brings it up "We can't have another Nero-style attack. We need to keep people safe, and I will do that by making us strong!" But there's no counter-argument except to put those words in the hands of the antagonist and we are supposed to instinctively think he's wrong. But there's no good argument to take Marcus' place. Spock would stand as a perfect counter-weight if he did more than quote the book. He has the experience of losing his home planet and has had to deal with that pain. Or introduce a character from a different culture that has already had to deal with this in their life, and it went to the point of totalitarianism.
They put it in the movie, but it's just a question, not an answer. That's why I don't like it.