Perhaps I'm missing something, but I still don't "see it".
In the white paper you assume:
"the input flow of honest transactions should be large enough compared to
the attackers computational power"
"we are going to use the fact that the main tangle
is supposed to have more (active) hashing power, and therefore manages to give
more cumulative weight to more transactions than the attacker"
Can anyone do the math of how many IOTA transactions per second will be needed to
overcome an attacker with, lets say, 1% of bitcoin hashing power in his hands trying to double spend?
Hashing power doesn't apply to Tangle in any traditional sense. And since there is no mining, no reward, no blockchain, no ASIC etc.
but, even if rogue nodes do attack the tangle: any p2p network presuppose a majority of honest nodes. check what mr nakamoto has to say about his blockchain:

any newborn p2p network will be more vulnerable, until enough hashrate "protects" it... btc had the oppportunity to fly under the radar long enough.