Do you really believe Italy and Spain would step into a conflict which is unrelated to them?
Oh especially Netherland or Germany would bother themselves into this?
Greece will be alone in the field, backed in diplomatic ways or soft force (embargo, EW, intelligence) the way they were in Liberation of Cyprus.
Judging from how things escalate currently, what would be EU's stance if Greece has fired the first bullet, mesmerized-encouraged by the support they received from EU, specifically from France?