Peace Truthseeker,
Surah Zumar was revealed pointing directly to migration and stating that the earth is spacious enough and the believers must not consider themselves constrained by the forces of tyranny and evil:
" Good is (the reward) for those who do good in this world, and Allah's earth is spacious! Only those who are patient shall receive their rewards in full without knowing" ( 39:10)
I just thought you might like to see an ayat of the Quran that allows for Muslims to migrate when being oppressed.
Peace and Blessings be to the Believers