Israel has banned the UN secretary-general. Is this legal - or right?

Contributing sentiments towards policy:

46% : My study is looking at two main questions: whether states have the right to bar UN officials and the implications of doing this.
46% : If UN officials are suspected of engaging in conduct harmful to a country's national interests and security, it also has a right to defend and protect itself.
46% : Therefore, while countries do have the sovereign power to declare UN officials persona non grata, they need to exercise restraint in how they use this power.
43% : In recent years, Ethiopia, Mali, Sudan and Armenia have all declared UN officials to be persona non grata, just to name a few.
41% : Can UN officials be declared persona non grata? There is a longstanding debate between the UN and its member states about the legality of such declarations.
30% : And banning UN officials specifically could also seriously jeopardise the organisation's work and put innocent lives at risk.

*Our bias meter rating uses data science including sentiment analysis, machine learning and our proprietary algorithm for determining biases in news articles. Bias scores are on a scale of -100% to 100% with higher negative scores being more liberal and higher positive scores being more conservative, and 0% being neutral. The rating is an independent analysis and is not affiliated nor sponsored by the news source or any other organization.