Regional separatism is quite strong, to the point of having leaked into the culture itself of those regions, but those movements are non-violent, to the point in which organized acts of violence have been virtually nonexistant since almost a decade and a half ago in the Basque Country and for even longer in Catalonia. No, the truth is that very few people would not get angry at the prospect of being forced into conscription (a concept that, if it wasn't awful enough by itself, is also tightly associated with the Francoist regime), and being on the other side of the continent no one really believes that Russia is any threat to us in particular. Moreover, the Spanish government has been pulling some moves that are very unpopular with the right-wing sector of the country by attempting to reach a compromise with the Catalan separatist movement and granting amnesty to the political prisoners of the Referendum of the 1st of October, so threatening the population with war mobilization is pretty much the worst thing they could do right now.

What I can say is that we have been importing a lot of Russian LNG, and for what I see at some point we were their 2nd largest clients worldwide only behind China. I couldn't find any information regarding how well has Spain's economy fared with this, but in other sources I found that only 5% of what we are buying goes to other members of the EU, so there's also that.