Ideologies don't quite spread like that. The entire "Spread of Communism" comes from the philosophical assumption within Communism that a workers revolution would cause a chain reaction that would cause all workers to rise, and that assumption would serve as a talking point for those opposed to communism so that they would point and say "Look, they want to spread their filth to our people", but this isn't quite what it actually looks like. 

They're not, like, sending guys on bikes preaching door to door. There is no communist "Wololo" guy. They most they could do is have spies and saboteurs, but these actions would be costing Sweden much less then militarization would. 

Commie Finland and the Western Communes are more or less failed states. The biggest threat from either of them would be the effects that their internal chaos would cause. People in the communes could be destitute enough to consider piracy, but this wouldn't be state sanctioned. Rather, it would involve dudes getting whatever weapons they can get and going out in whatever boat they can find to rob undefended ships. You would also most likely have problems with illegal immigrations and crime along the border, but since your border with Finland is so small and rough, it's unlikely that crime would amount to much more than smuggling or maybe a little light farmer-robbing/cattle rustling. 

You'd have to ask Googer what Spain's policy regarding foreign aid is.