Reply To: Some parks in New York used to be cemeteries

It is a minority opinion in the Gemara that non-Jews do not impart Tumas Ohel. It’s a pretty even split in Rishonim. People have different readings as to how exactly the Shulchan Aruch Paskens. All in all, it’s as much of an even split as you’ll find in any Sugya. But it’s pretty clear that at least Lechatchilah Kohanim should be Machmir on this.