The terrorists, like many Americans (and probably people all over the world), tend to view other countries from their own cultural point of view. It leads to misunderstandings and miscalculations.
As Americans, you guys know what the reaction would be to terrorist attacks just before the election. The terrorists, with a few exceptions, did not grow up in America and do not have the innate understanding of this country that you guys do, just like few people on this board really understand the terrorists' thought processes.
So an attack is very possible, even though it would ensure a Bush win, because the terrorists might wrongly assume Americans would react like Arabs (or the Spanish) would to an attack.
This is exactly what happened in Russia this week. The terrorists, with apparently no understanding of the Russian mind, attempted to shock and terrify the Russian people. Instead, they managed to infuriate the entire nation in a way they could not have achieved had they tried. Soon the world will realize the magnitude of the terrorists' mistake. Nobody in this generation has seen the Russian people truly pissed off.