My understanding is that the host country has to agree to receive diplomats, and can expel them at their leisure.
Could it be the case that Tunisia didn't grant his ingress as a diplomat they knew would be investigating their non-compliance with sanctions, he went and did the investigation anyway, and Tunisia now consider this to be a violation of that non-consent?
Could it be the case that Tunisia didn't grant his ingress as a diplomat they knew would be investigating their non-compliance with sanctions, he went and did the investigation anyway, and Tunisia now consider this to be a violation of that non-consent?