If they are prevented from moving back to Jerusalem or from taking their spouses to live in the family home. Then they are forced to leave Palestinian East Jerusalem and thus the Israeli occupier can deny them right of return and residency. You might like to cosy it up in nice phrases like re-settlement or revocation of residency, but in reality Israel is enacting it's own version of the Nuremburg Laws. And you are happy and proud about it.
from the article: Israel stripped thousands of Jerusalem Arabs of residency in 2008