Equivalence again.
I see no problem at all with nations like the U.S., Britain, or even (at this point) Russia and China possessing nuclear arms, yet forbidding them to nations like Iran and North Korea.
Oddly enough, I also see no problem with forbidding guns to psychotic serial killers, but allowing policemen, bank guards, and honest citizens having them.
In some people's universe, this is "inconsistent." But there it is.
At this point, I wouldn't lose a lot of sleep if Brazil had the bomb.