West is going to be hard because Poland is in the EU and NATO and houses a lot of US troops and weapons. Killing US troops on Polish soil would basically mean a war with the USA which Russia cannot win. Also, attacking the EU would mean attacking neighboring countries with pretty significant striking power like Sweden (good air force), UK (nuclear submarines), and so on. Based on what Putin is doing right now which is murdering civilians for no reason, I can't definitely say he won't try it, but it would be a suicidal move.