So, making it sound like this wave of immigration is particularly different in essence doesn't hold water.
Europe is still grappling with the large wave of non-European immigration from the second half of the 20th century up to now, which has been and is still causing a lot of social and cultural problems.
The last thing Europe needs is to add more fuel to the fire, especially that, again, immigration is not a solution and is not needed.
IN ESSENCE, absorbing migrants is not an easy task, and this applies to ALL migrants, no exceptions made. IN PARTICULAR, some migrants might pose additional challenges to integrate but they are not necessarily to blame fully for this, sometimes the host population are biased against them making the process more arduous for them, while giving at the same time a preferential treatment to other migrant populations.
Of course, for instance when Italians migrated to France that did create some tensions at the time but a generation later there was no difference apart from the Italian family names, because French and Italian cultures are very similar and, yes let's be honest, they both look pretty much the same.
Europe can and should pick and choose who to let in. As things stand there is no benefit for Europe in mass immigration from outside of Europe.
Immigration is a short term, economically lazy option, and on large scales leads to major political and social issues, and people do not want it. Politically it is either naive or a tool to advance an agenda.
Our societies need to face the issue of constant (even decreasing in the medium term) population and adapt to it economically and socially instead of trying to kick the ball down the road. The sooner we realise this the better.
> Remittance money will boost the local economy and in time
This pie in the sky thinking. All countries developed today or on their way have got there through their own development and industrialisation work. Countries that rely on remittance have an interest and need to keep sending people abroad as that is de facto their "export product" they rely on to survive.