Except for Ukraine, which is a controversial subject, when was the last time Russia directly threatened a sovereign nation and overthrew their governments?
Now, how about the US in the last 14 years - Iraq, Afghanistan, Venezuela, Haiti, Gaza Strip, Somalia, Iran, Lybia and Syria. Does that not come off as "crazy" to you?
EDIT: oops, sorry. Forgot Yemen and Pakistan, against whom there is no official declaration of war either.