To take you literally for a moment: if anyone can claim land across a border, based on a historical grievance, then no border would stand. 70 years without a border war in Europe, so yeah we should try to push that water back up the hill. Otherwise a recursive "I would like my land back please."
Whatever a person's stance on ongoing political events or active conflicts, punishing them en masse for choosing to be born on the wrong side of an arbitrary border is nonsensical.
Ethnic cleansing of North America, Slave codes, yellow peril, Japanese internment, red scare, islamophobia, red scare 2.0 (ongoing), yellow peril 2.0 (ongoing)