Naturalized citizens can have their citizenship revoked if they engage in terrorism or immigration fraud.If they are Indian nationals then fine deport. them when their visas expire.
However on the contrary these are Canadian Citizens and The Canadian Government have an obligation to protect them when no real evidence has been provided.
Once again Canada has expatriated their citizens when the real evidence has been provided by the Indian Government!!
These people do both. Like Nijjar.
Revoke citizenship and deport!