Strong crypto is the answer to his fears
Let's look at his three fears from the viewpoint of strong cryptography:
1) Attacks on Infrastructure
Properly used, strong cryptography is going to make this harder for the attackers; possibly to the point of making it not worth trying.
2) Data Tampering
Strong cryptography is definitely the answer here; if you don't have the keys, you can't get at the data.
3) Hostile Action
Hostile action, against infrastructure or data, will only be hampered by strong cryptography; and the opposite is true, "our" back-doors become vulnerabilities for "them" to exploit.
So, in summary, the Admiral's nightmares will only be worse in a world of government mandated weak cryptography; turns out he should be on our side after all.