There are tons of lessons to be learned from this war. I'll mention one:
We have to decide, as individuals and as nations, which side we belong to. Either we're Muslim or we are not. You can't be 25% Muslims and 75% atheist, or 50% Muslim and 50% Western, or 75% Muslim and 25% nationalist. Confused people who're not 100% Muslim cause the most conflict. If we're 100% Muslims then we need to unite to defend ourselves.
As individuals people have divided loyalties--to their country, to their sect, to their ethnicity etc. and Islam becomes the No. 2 priority. They're the ones who will argue and fight for their national or sectarian issues.
It is the same issue with countries. Most Muslim countries were created by enemies of Islam and now Muslims take them more seriously than their religion. E.g. the area called Sham, or Syria, included Jordan, Palestine, Lebanon, and Syria. An foreign enemy attacking one of them would have found that whole area fighting them. But because the British and French created several countries, now an attack on Palestine is not the problem of Lebanon or Jordan or Syria. They attack Muslims one at a time.
The reality is that in the time of Islamic Caliphates, an attack on any part of the vast Islamic empire would have resulted in Muslims from all over joining in the war. That's what we need again. If Turkey or Iran or Egypt or Pakistan think that they will avoid getting attacked then they're deluded. The Anglo-Zionists have already destroyed 6-8 Muslim countries and killed over 10 million Muslims. Now the Jews are on a warpath and thirsty for Muslim blood and they will speed up the destruction.
If Muslims don't unite and prepare to defend themselves then expect an even worse slaughter in the coming years. The Anglo-Zions would love to kill each of us and our families and will laugh while we're dying and dance on our graves.