Migrants come to Europe because of imperialist wars and the plundering of their countries, so it's only right to welcome them.
Summary
Europe and the USA are provoking wars and fanning the flames all over Africa. They also happily plunder the natural resources of these countries via multinationals, which take the lion's share by paying low prices for these resources. Finally, capitalist countries support dictators who oppress and despoil their already disinherited peoples, when they haven't installed them in power. All these conditions lead to the migration of populations who can't take it anymore and risk death. Then Europe and the rich countries take offense, wanting to close their borders to these people they themselves have forced to migrate!
The simplest form of humanism is to welcome these migrants, however numerous they may be, in the hope that this will more or less remedy the intolerable situations they have created.Quotes
“Fatou Diome sets the record straight, reminding us of the weight of colonization and the "systematic plundering of resources" in the persistent disparities in wealth between Europe and Africa, but also, and above all, of the "current and continuing responsibility of European states, which support corrupt regimes that hinder the development of African countries".”