The confusion might stem from:
* Stereotypes: There's a history of harmful stereotypes about Polish people, sometimes associating them with Catholicism and lavishness.
* Similar Phrases: There are similar, but not identical, phrases referencing places of worship being brightly lit. For example, "lit up like a Christmas tree" is a common idiom.
It's important to remember that using phrases like this can perpetuate harmful stereotypes and should be avoided.