There are more attacks than just the 50%+1 attack.
Certainly, but I'm not sure that you understand what the "50% +1" attack is, what it can accomplish, or what some of the alternative attacks are.
Orphaning blocks for instance.
Blocks are orphaned all the time. There is nothing wrong with this. It is a part of the netowrk working out a consensus. Now if someone had more than 50% of the hashing power, they could choose which blocks are orphaned, and which are not. This is part of the "50% +1" attack.
Commandeering major mining operations,
What would this allow you to do? I suppose if you commandeered enough of them, you'd control more than 50% of the network hashing power, but that's just a "50% +1" attack. I thought you were listing "other" attacks?
a virus (like stutnex attacking nuclear facilities),
What would this virus do? It might steal from individual wallets that aren't properly secured, but that's not an attack on the bitcoin network, it's just an attack on the wealth of individuals that don't properly secure their bitcoins.
DDOS (NSA has a lot of influence over the main DNS providers.),
I don't think bitcoin uses DNS. There isn't a single server to DDOS against. You'd have to find a way to DDOS every single node on the system to DDOS a decentralized peer-to-peer protocol such as bitcoin, wouldn't you?
them figuring out the identity of Satoshi (What is the NSA's job again?) forcing Satoshi to give up his wallet then we'd have the DPR problem but on an even larger scale.
I don't see a DPR "problem", and I don't see any "problem" with Satoshi's coins being spent.
This would be more than "panic selling" where even the loyalist to bitcoin (such as myself) would have to logically realize that getting out of the market would be the smartest thing to do.
Other than the "50% +1" attack, I don't see anything in your list that would cause me to panic and "get out of the market". If someone did manage to acquire more than 50% of the total network hashing power, then they could prevent you from "getting out of the market", but refusing to confirm any of your transactions.
alter the block chain so the FBI's coins no longer exist. I'm not sure if this is even possible? But something to consider.
No thanks. As far as I'm concerned, those are legitmate bitcoins. There is no reason to "alter the block chain so the FBI's coins no longer exist".