Strong encryption cannot be back doored in an effective way, this is just a fact. Ignoring that fact because we wish it were otherwise, or asking the people that point out that fact what we're supposed to do in light of that fact, doesn't change that fact.
The group constantly pushing for backdoored strong encryption fails to realise that they are asking for regulations to ensure that all water is only ever sold in ice form. This does not, and cannot, mean that all water will only be available as ice. This needs to be realised, accepted and moved on from.
Only then we can start actually trying to formulate a coherent asymmetric warfare strategy, cognisant of the actual facts on the ground rather than wishful thinking and ignorance.