This is different, this is not diplomatic in any way, the only issue is that the government is bound to protect foreign dignitaries and foreign citizens.
HOWEVER: a state of hostility can be interpreted, and since there is no formal diplomatic delegation this can be interpreted as a hostile incursion.
In any case, since they have been asked not to come Greenland has 0 obligation to protect them in any way, and they have 0 diplomatic protection as persona non grata.
Diplomatic immunity applies to criminal charges.
This is different, this is not diplomatic in any way, the only issue is that the government is bound to protect foreign dignitaries and foreign citizens.
HOWEVER: a state of hostility can be interpreted, and since there is no formal diplomatic delegation this can be interpreted as a hostile incursion.
In any case, since they have been asked not to come Greenland has 0 obligation to protect them in any way, and they have 0 diplomatic protection as persona non grata.