[A. Pole]

The Reconquista was the earliest, the longest and the only completely succesful European Crusade in Christendom.

What about Russian lead liberation of Balkans and Russia itself? If West did not oppose it(Crimean War etc), probably Constantinople("Istambul") and coast of Asian Minor("Turkey") would be still Christian today.

[Polybius]

What about Russian lead liberation of Balkans and Russia itself? If West did not oppose it(Crimean War etc), probably Constantinople("Istambul") and coast of Asian Minor("Turkey") would be still Christian today.

Well, for whatever reasons, there is still that little dark green chunk of Islamic Europe in the Balkans.

The defeat of Islam in Spain was complete and the Reconquista was therefore the "most successful" Crusade in Europe.

[Cronos]

If West did not oppose it(Crimean War etc), probably Constantinople("Istambul") and coast of Asian Minor("Turkey") would be still Christian today.

The Crimean war took place only in the 1800s. until the 1700s Turkey was still the Superpower in the Europe and could threaten Vienna. However, you are correct, if the English and French hadn't fought alongside theMuslim Turks against Russia then Constantinople would have re-risen, all of Eastern Europe could have been freed from the Ottoman yoke a lot earlier.