[brent13a]

Probably since Jews were tolerated under Moorish rule.

The Moors ruled parts of spain from 711 to 1492. This possible synagogue is 1700 years old. That means the jews who built it in Spain predated the Moors by at least 350 years.
Secondarily, "tolerated" is a strong term. They were at best second class citizens (paying massive taxes/fines even for that) and not due any protections. The so-called "golden age of moorish rule" whitewashes and romanticizes that era. Leftists have completely changed how awful that time frame was for non-muslims.

[erlayman]

I’m not arguing Jews and Christians were not at the bottom of the social order but the Muslims armies would still have been seen as liberators from very severe persecution, even slavery, that existed under the Visigoths. We also don’t know when this particular Jewish community was disbanded/expelled although I’m assuming without further record it was under Christian rule at the end of the Roman era.