Mixing and finishing the pasta in the sauce results in better tasting food. I don't care if some angry Sicilian claims that's not "authentic" or some garbage. They don't own the concept of pasta in tomato sauce anymore.
Morocco is the leading supplier to the EU, accounting for 70% of the EU's total imports, followed by Turkey.
Same ie potatoes in eastern Europe, a base in many many 'traditional' dishes. Yes if we look maybe 10 generations back, not so much for say 30 generations
So much of creativity is the result of mixing diverse elements in unique ways. And it's especially rich to rant about "purity" or cultural "ownership" regarding something that is fundamentally the result of such a fusion.
EDIT: Speaking of which, if you haven't tried pasta or pizza with a Portuguese pepper-tomato sauce, you're missing out.