All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
If the matter is as you mentioned in the question, and you cannot migrate with your family except by taking Riba (interest and/or usury), then it becomes permissible, Allaah willing, because the necessities make what is forbidden permissible. Indeed, there is no necessity greater than that of protecting one’s religion. Allaah Says (what means): {He has explained in detail to you what He has forbidden you, excepting that to which you are compelled.}[Quran 6:119] Allaah also Says (what means): {…and the Fitnah is worse than killing.}[Quran 2:191] The Fitnah here means committing disbelief in Allaah and associating others in worship with Him.