>>>We should though (in Europe) fear that this may set a very dangerous precedent
Surely this is already happening in Europe (though maybe not so organized)
We have seen thousands of people (illegal immigrants) turning up on the shores of Southern European countries (Greece, Italy etc).
We have seen thousands living in shanty towns in Calais ready to leap on a lorry or walk through the tunnel to get to the UK.
We have even had people turning up on the shores of Kent in the last few days.
https://www.kentonline.co.uk/dover/news/sixth-group-of-migrants-caught-trying-to-reach-kent-193583/
While I accept many people live in "poor" countries not as well off as some rich countries (like the USA, UK, Germany etc) we cannot have a situation where everyone from a "poor" country has the right to go and live in a "rich" country (and sponge off it for the rest of their lives).
That way we are reduced to anarchy.