India has been directly accused of this by Canada; confirmed by several sources outside Canada. It's basically impossible to deny India had done this.
Mind you, India hates Canada. We are stealing all their top talent as migrants.
On the subject of khalistan. You drive by a gurduwar here in Canada and they all seem to be pro-khalistan.
They have to do it now. India is about to become the Asian super power in China's collapse. When this shift happens, the sikhs will have no opportunity for independence for probably 200+ years.