Approximately 400,000 Palestinians lived in Kuwait before the Gulf War of 1990-1991. Did they have an opportunity to assimilate into Kuwait society and culture?
That's simply a "yes" or "no" question, although your answer will of course depend both upon your source of information, and your concept of assimilation.
There are some potentially interesting follow-up questions:
(if your answer is that they didn't have an opportunity to assimilate)
- Were they prevented from assimilating for their own good, to help them preserve their culture?
- Were they prevented from assimilating primarily to help the government of Kuwait achieve some policy objective that was not aimed at helping Palestinians in Kuwait?
If there was some assimilation, then it seems that there is a defining condition for a distinct group of refugees: Palestinians whose normal place of residence was Kuwait during some period of time to be agreed upon (analogous to the official UNRWA definition for Palestinians: "persons whose normal place of residence was Palestine during the period 1 June 1946 to 15 May 1948." https://www.unrwa.org/palestine-refugees)
If your answer is that they did assimilate into Kuwait society and Kuwait culture to some extent, then their identity became in part a Kuwaiti identity.
It is possible to completely ignore the question of personal identity and focus very narrowly on questions of legal status.
However, if we focus on legal status, then for various well-known examples of persecution (such as Falun Gong in China or Bahai in Iran), we will find a combination of official denial that there have been any actions that can be fairly described as persecution, along with the claim that unpleasant experiences of the persecuted are technically legal, under the laws of the given country.
The majority of news media coverage of issues involving Palestinians doesn't seem to be designed for an audience of lawyers. However, if the crux of the matter is technical matters in law, then perhaps it should be designed for an audience of lawyers.
Now, it occurs to me that it is theoretically possible to say that 400,000 Palestinians in Kuwait had an opportunity to assimilate, but that none of them chose to make use of their opportunity. However, some explanation would be required, because that doesn't sound plausible.