NATO's action vis a vis Russia is clearly deterrent, and the core purpose of the alliance is quite clearly deterrance. That the same command structures have been used to coordinate non-Russia-related actions (Yugoslavia too) isn't relevant to the point you're responding to.
You can deploy all the anti-imperialist hyperbole you want, but the "reason" for having a mutual defense treaty among quite-clearly-non-dominated nations like Germany or the UK is pretty obviously defense.
You can deploy all the anti-imperialist hyperbole you want, but the "reason" for having a mutual defense treaty among quite-clearly-non-dominated nations like Germany or the UK is pretty obviously defense.