Well, America was once the land of Native Indians, and half of Europe was the land of Muslims, including the Spanish, Greek, Serbian, Bulgarian, Hungarian, Bosnian, Cypriot, Austrian, Polish, and Ukrainian empires. The entire Subcontinent was also Muslim once. So, if Muslims attack these lands today, they are simply reclaiming what was once theirs. All countries should support us in this endeavor because these lands previously belonged to Muslims.
Your logic is flawed. If I lived in a different home some years ago, does that mean I can just go in there now, kill the kids, kick the family out, and justify my actions by saying that it was my previous home? Of course not! That would be absurd!