For now all the talk about Russia attacking Nato is just talk

Its regime is already attacking NATO -- at least from what more or less officially amounts to NATO's perspective:

Russian acts of sabotage may lead to NATO invoking Article 5, says BND chief - https://news.ycombinator.com/item?id=42276160

Just not in any old school, "tanks across the Vistula" sense.

But in a modern 21st century sense.