Why do any of you think this is a good idea? What benefit does it do to not have allies?
I'll bite. It significantly reduces the possibility of WW3 and/or a nuclear holocaust.
Exactly the opposite, actually. A collapse of NATO would inevitably lead to further Russian aggression in Eastern Europe, which would eventually lead to a point at which world leaders are no longer willing to accept it - whether this is in Warsaw, Berlin, or Paris depends on the leadership in question. At this point, we either return to where we are now (except with a far diminished alliance) or enter global conflict. Deterrence at the margins is the best way to prevent eventual conflict.
Both of Karpatsky's posts (this one and the prior on page 1) are pretty much spot-on.
I think there is a lack of knowledge of International Studies and international relations (including war studies) from some posters in this thread.