i was talking about the fatality of the attack which would be enorm compared to a little doublespend.
Do you even comprehend the topic or you just try to deny it without even looking at/understanding it?

What the guy means is total doomsday; and relatively cheap considered the possible successrate and impact.
To resolve this issue one would need to hardfork bitcoin and change difficulty retarget. It's a total vulnerability as it is now.