Yeah. At the start, it was friends and family members.

Decades later, it was uncles and grandparents.

Nowadays, it's basically refugees who speak the same language, but a different accent...and are VERY culturally different.

Good luck convincing a developed nation to accept 26 million refugees overnight, who are likely undernourished and undereducated. In exchange, you get 120K KM of land which might be resource-wealthy, but then you also have to be mindful that there might be terrorists who oppose the government.

Reunification sounded great decades ago. It still sounds great on paper in a best case scenario (aka. fantasy land). Even if it's "the right thing to do", though, it's not going to be easy.