Most countries around the world, certainly most developed countries, have some form of "good character" requirement for people who are not already citizens to acquire citizenship. So serial or dangerous criminals may find it hard to acquire citizenship.
I think that you are confusing entitlement to a citizenship with already having citizenship. Having the citizenship of a country is determined by the national laws of that country and can persist in spite of several generations outside that country.allahrasool wrote: ↑Sat Feb 15, 2020 6:11 amwhy would the UK Gov expect another country to entertain a request to accept such a serious criminal who is a British citizen even if this person was entitled to that country's nationality through any route.. After the serious crime committed this person does not meet the good character required to obtain that country's citizenship anymore .
So, for instance, Poland regards all people born of Polish descent, no matter how many generations earlier, as Polish citizens and used to impose compulsory military service requirements on them even if they were not aware that they were dual Polish-other citizens and just on a short trip to Poland. That is why, for instance, in the midst of the Cold War, the US had to negotiate special provisions with Poland that allowed US citizens of Polish descent to not be treated as Polish citizens when visiting Poland. (Wikipedia article on Polish nationality law)
Similarly Chinese nationality law and Italian nationality law allow citizenships to be transmitted over multiple generations abroad, thus conferring citizenship on people who may not be aware of it and who may never exercise it.
In these cases, the relevant people (of Polish, Italian or Chinese descent) are already citizens of their relevant countries, not merely entitled to it, even if they do not have a passport of that country.
And as I had mentioned above, the Home Office is generally aware of the citizenship laws of most major countries and can request the British Embassy in that country for assistance in clarifying the nationality law of that country.
On a different note, the BBC posted a profile of one of the 17 who were deported to Jamaica on Tuesday. It seems that he was convicted 10 times for a total of 22 offences, including burglary.