Reclaiming your lands in the name of Islam is on way mean you have to discard your identity as the custodian of world most ancient civilization.
Egypt and Iraq in their present state has nothing to do with their respective civilization, hell, they abandoned their identity and their ancient language and adopted Arabic and became Arabic. Yet their hold on to their roots.
IVC gives us superiority over the hyper national Indians, Afghans and Persians. Because we were the ultimate custodians of this region long before these lot existed. So if they claim our lands because xyz, we can always fall back on IVC and slap them up.