I recently spent time in Costa Rica where I was able to visit the nation’s central Jewish “compound” in San Jose, the capital city. My guide was a member of one of the country’s leading Jewish families.

I called it a compound — as opposed to a campus — because that’s how it felt. High concrete walls that seemed more appropriate for a military facility than what I actually encountered — a broad, grassy, central plaza surrounded by a small kosher restaurant, a community history and Holocaust museum, a private Jewish school, a large synagogue I was told is filled on important Jewish holidays and for rites of passage, a senior citizens center, and assorted other community offices.

Had I not been escorted by a member of a leading Costa Rican Jewish family, my wife and I would have had to submit, for security reasons, our identifying information eight days in advance of a visit. As it turned out, thanks to our friend, we just show up and were whisked past the armed guards waiting outside the compound’s thick metal doors.

All this in a nation with only about 3,000 Jews — most able to trace their ancestry to World War II-era Poland — and who our guide insisted face relatively little overt anti-Semitism or anti-Israel sentiment. And yet they're fearful. Why?

Because Jews across the world — particularly so in Europe but also in tiny Costa Rica and even the United States —  increasingly feel insecure because of a rising tide of anti-Semitic and anti-Israel actions — the two are often wrongly conflated, by both sides — being reported in the international press, as they should be.

The majority of GetReligion readers, I’m sure, are familiar with this turn of events. But let’s probe a  bit deeper. What’s causing this upsurge today?

Is it an ugly resurfacing of the historical anti-Semitism that Jews have faced since the earliest decades of Christianity's split from Judaism, the first of the big three Abrahamic faiths?

Or is it a product of the further globalization of Islam, sparked in part by Muslim immigrants fleeing poverty and violence in their native lands, and the impact this and their general attitudes toward Israel has had on the societies in which they've resettled?