Islam influenced Southern Europe and the Balkans to a large extent.
One cannot help but look in amazement at the civilization of Al-Andalus or the Emirate of Sicily, for instance.
Iberia is certainly an interesting corner of Europe. In one sense, we can say it is the most
Semitic—between the residency of the Sephardic Jews there, the Moorish conquest, and its two epochs of Christianity, and all the resultant hostilities. And yet it is none the worse for wear.
For what follows, I'm sure you will know that I do not ask this in the same vein as your various interlocutors here who attempt to
auto-da-fé you into revealing yourself as some sort of crypto-Mohammedan. But I think it has to be agreed: it would have been overall worse for Europe had it gone to Islam rather than Christianity,
n'est-ce pas? (Somewhere an alternate history or two has probably been written about this, where Charles Martel was defeated instead of having triumphed). Interestingly, Nietzsche, who was mentioned earlier on this thread, once said he would have favored Islam, so great was his contempt for Christianity. I do not agree with him there.