The ends don't justify the means, simple as that.
And to your second point, by doing the same to kids of people we don't like, we are setting precisely that precedent. Always refreshing to see that the world is comprised of assholes, no matter their political leanings.

Are you seriously justifying ridiculing a 10 year old kid because other morally corrupt people did the same to kids in 'our camp'? What the fuck kind of logic is that, the fact that one wrong does not justify another is one so simple that we teach it to kids in kindergarten. Everyone who participates in this circle…