Well that's my point. Unless the paper outlines something like... certain chemical levels on Martian meteorites that are otherwise absent on early Earth which are responsible for the formation of life, the facts seem to be entirely parallel and aren't crossing over. We know Martian meteorites exist and we know Mars once could've been a breeding ground for life but we don't know that the two ever game together. It's fair to investigate it, but it's not okay to claim it unless evidence on a collected sample says so.
If it's igneous material, it's an achondrite. A Nakhlite is probably a group of achondrites native to Mars (there's a ton of types, of which I'm only familiar with the Vesta family of Howardites, Eucrites, and Diogenites). Achondrites have undergone heating, so they lose their chondrules. If it's from Mars, Mars was condensed and heated.
Come to think of it, the word Nakhla is Arabic for Palm Tree, I think. Common shisha tobacco brand. I'm assuming they're Egyptian in discovery. but NWA is northwest... I'm going on a tangent.