I don't think you're paying attention. Bush's invite of Ukraine and Georgia into NATO in 2007 (against the opinion of France and Germany) was probably a cause of Russian invasion into South Ossetia.
And just about recently a newly chosen top NATO chief has been promoting path for Ukraine to enter NATO (and so-called "West Germany model"), despite that Putin clearly demanded Ukraine neutrality and NATO's own rule about not admitting members with an ongoing territorial disputes.
I can hardly imagine how could Russians be clearer about opposing NATO expansion.