I find it doubtful that the government would add 'anti-Kusari' lectures or notes to any kind of curriculum, there would be a large amount of dissent for that, at least early on.
However, there are no rules about propoganda outside the school, and the kids would likely be heavily influenced by that indirectly. Not to mention a good amount of them must have lost friends and family to the war, depending their mistrust or even hatred towards the Kusari people.
Its a classic case of hate breeds hate. Doesn't matter who or where its from, as long as there is a war going on the younger generation is going to be the worst affected by it.
I may get a slap for this, but think about the run-up to the Cold War when USA introduced anti-communist propaganda and laws since they feared the Soviet influence so much. Truman was it? That's just an example, not a stab at USA.