I think there's two issues we're trying to battle here:
1) defend and protect DS practitioners?
2) critique Dalai Lama's actions (which is different from "criticise", mind you)
I think ultimately, we all just want to promote and defend Dorje Shugden practitioners and his very wonderful practice. We "fight" against the people who put us down or attack us or ban us or whatever, because we don't think it is right, or fair, or truthful in any way.
The best way to really promote our holy Protector & his practice, and to shut up those who are against DS practitioners is to be even kinder, even more compassionate, be an EVEN BETTER Dharma practitioner and uphold the teachings of our Lamas even stronger, achieve even greater mind transformation. The world will see this - they will look upon DS practitioners and realise that they are incredible people; effective, generous and beneficial practitioners and see that DS is, after all, something special and beneficial to look into. The best kind of "protest" we can make against Dalai Lama's ban and the anti-shugden perpetrators is to be even better than them. Kill them kindness, as it were.