Yes i would class London as not safe as well and i should know i live here
The only thing that has stopped more bombings here is good police intelligence and the police are watching many of these people 24/7 and yes there are many of them just waiting for a chance
Unfortunately things are not like this in Mindanao and the police there dont have the resources or manpower to watch many of the Muslim extremists who reside on that island
Granted most of the trouble is to the west of the island but they did bomb Davao airport a few years back