To be a desirable place to live does not necessitate being a country. I could have used Aberdeen, Devon, or Paris as examples.So from your examples you are claiming that Jersey, Monaco, Gibraltar and Guernsey are bona fide countries are you? FCK OFFOther countries have higher population density and live quite contentedly side by side with each other.
Therefore assertions about population density is a red herring.
But of the examples I used, only Gibraltar fails your nonsensical test. UK would also fail your nonsensical test.
Your use of foul language and your aggression speaks volumes about you, not to mention your inability to debate sensibly.