Some of the Sephardic Jews expelled from Spain went to Portugal, but in 1497 that country effectively converted all remaining Jewish children, making them wards of the state unless the parents also converted. Therefore, many of the early crypto-Jewish migrants to Mexico in the early colonial days were technically first to second-generation Portuguese with Spanish roots before that. The number of such Portuguese migrants was significant enough that Spanish colonists began to use "Portuguese" as a synonym for "Jewish" for their settlers. Immigration to Mexico offered lucrative trade possibilities in a well-populated colony with nascent Spanish culture. Some migrants believed that this region would be more tolerant since the lands were overwhelmingly populated by non-Christian indigenous peoples and it was far removed from the metropole.