Tech_Esq
Sic Semper Tyrannis!
Considering Germanys ability to defend itself:
1: From whom?
There are only two countries in the world that have the force projection capacity to reach Germany with significant forces, the name of one country is the USA. Germany happens to be allied with them.
The only other contender is Russia, who is not going to get military access from Poland anytime soon.
Politics are not a Computer Game, any declaration of war will have a buildup of tensions first. Germany can easily built its own nukes in about a year, or we could just buy them from France.
Secondly, lets have look at what the German Army is: the current manpower is at some 250.000. If an invasion looms, Germany could easily recruit fairly large numbers (total number of persons fit for service is 15.25 million, between a third and a half of them have received military training) since we do have a compulsory military service which produces large amounts of reservists.
From what I have seen during my time in the German Army, our army (Heer) is propably technologically at least equal to slightly superior to the American one. German forces have a clear lead in small arms, a (very) clear lead in Self propelled artillery, will soon have a lead in Armored personal carriers (simply becaue the Puma is about a 2 decades newer) and are about equal in main battle tanks. The US has better Attack Chopters, and propably an edge in MLRS systems. The technological lead would disappear if the US decides to go for a serious modernisation, which was attempted in f.e. the Crusader project. However that failed.
Germanys Airforce is off worse technogically, the whole Eurofighter buisness was likely a shot in the leg. The not so great Germany navy would propably not play a huge role in a Russian invasion.
Bottom line, Germany is quite fine, tank you
You are fooling yourself if you believe what you profess in that post. Although I agree for the most part with your relative analysis of the quality of German military equipment, you clearly have no concept of what they would be facing should a Russian attack come.
Having been stationed in Germany during the crescendo of the cold war and having been through countless command exercises of probable attack scenarios, the Germans would be lucky if they could achieve a minor slowdown at the Main river. Given the current status of preparedness (and even planning), it's unlikely that the old REFORGER (Return of Forces to Germany) plan could be effectuated. I'm sure prepositioned equipment for that has long since been liquidated. So forget about any "real" American assistance in anything like time to save Germany.
If Russia was going to attack Germany, they would likely want to attack Poland for the same reason, so I would look at Poland as a speed bump rather than a buffer. The best thing for Germany to do would be lurch forward and try to fight as much as possible in Poland rather than Germany. The biggest problem Germany would face is not their inability to defeat the forces arrayed against it, but a lack of logistical supply. You would not be able to keep your combat forces adequately supplied with ammunition to stem the tide of Motorized Rifle Divisions flooding over the border. Remember the Russian have always traded numbers for quality and ground for time. Their tanks are not as good as NATO, but they have so many of them, it won't matter, they are "good enough." Add a lack of crucial Air Superiority, and Germany is finished. Only if the US participates (don't count on that now) and can move enough fighters over to achieve air supremacy over the battle area would Germany have a fighting chance. Keep in mind, where there are air forces involved, nobody has been successful on the battlefield if the other side has air superiority over them since WWII.
No, Germany is not "quite fine" by itself. The Bundeswehr is a critical part of a combined NATO land force. Placed into combat as a part of that force, it would acquit itself admirably, there is no doubt. Standing alone against either the US or the Russians, there should not be any doubt in your mind about the outcome. It would be swift and decisive.