Are nuclear missiles located in Europe and pointed to the East also "purely defensive" weapon? It doesn't help good relations when you have a gun pointed at your face.
Yes, they are exactly that. The only (current) working deterrence/defensive strategy against an attack from nuclear weapons is the threat of a nuclear reprisal.
This has stopped a war directly between the major powers for the last 70 years and is known as MAD - Mutually assured destruction.
Its not a situation which anybody is comfortable with, but it works.
Honestly, this is basic cold war history stuff. Your question above shows you are either completely naïve or you consume way too much Russian propaganda.
Defensive weapon is something of an oxymoron, apart from technologies like missile defense [1]. Putting that to one side, rational deterrence theory[2] suggests that:
(Probability of deterrer carrying out deterrent threat × Costs if threat carried out) > (Probability of the attacker accomplishing the action × Benefits of the action)
You could argue that Russia successfully destabilising the US (via Trump) and Europe (via Brexit and far right) is proof that nuclear missiles "pointed to the east" worked at defending against direct conflict and forced an alternative.
Are nuclear missiles located in Europe and pointed to the East also "purely defensive" weapon? It doesn't help good relations when you have a gun pointed at your face.