I don't think that the Sikhs are supporting abuse, more like denying it. By their actions they have ensured far more publicity for the play than if they had quietly ignored it.

Today, I see the play billed as a "black comedy". However it doesn't really matter what what kind of play it is, if it's legal, and I assume the that the experienced producers had enough sense to check that it infringed no law of the land, then it shouldn't be allowed to be stopped, not "banned", by illegal acts.

I can understand why the Sikh elders are upset, but they have to accept the law of the land.