The Pleasance mystery

So I was riding around and came across Pleasance again. The abandoned town where everyone was murdered on the same day. It's always bugged me that I couldn't figure it out so I went to take a look again. I ended up searching each first and last name and I noticed there were a lot of Hebrew names and Irish names specifically. I'm wondering if the cause of the mass murders and "Ill with sin" graffiti could be antisemitism/ anti-irish sentiment? Antisemitism started mostly in the 1880s in the US, along with anti irish sentiment, so the timeline would make sense. I'd love to hear people's thoughts on this.