No need to apologize. It's just that some good advice which was earlier given you is no longer available because those threads were deleted twice.
Your friend's case is quite unusual. Someone in a similar situation would also have been quite concerned.
One thought:
Your friend provided his real name + his email address when he sought advice in the Refugees section of this forum. Just maybe someone who does not wish well for him, complained to IRCC about your friend's intentions to apply for asylum. That probably lead IRCC to investigate his case.
I find it quite implausible that IRCC has the time and the resources to run checks/search open sources and public forums.... on a regular basis.... for information about visa holders several years after Canada visas were issued.
But to avoid the risk of falling prey to a phishing email.... it would help if you email the Riyadh visa office ('riyadh' with an 'i'). Do not hit the reply button to the email that your friend received
