In general, we need to admit that we did not fully understand the complexity and the dangers of the processes at work in our own country and in the world. In any case, we proved unable to react adequately. We showed ourselves to be weak. And the weak get beaten.
Some would like to tear from us a “juicy piece of pie”. Others help them.
They help, reasoning that Russia still remains one of the world’s major nuclear powers, and as such still represents a threat to them. And so they reason that this threat should be removed.
Terrorism, of course, is just an instrument to achieve these aims.