>>Facts and logical thought sway my opinions. <<
It's hardly fact that the terrorist bombing caused a turn in the spanish election. If anything, this opinion is more an emotional response to not getting a desired result. Short of every voter coming out and saying they voted for the socialist party as a result of the bombing, any opinions you may read are only speculation.
A falure of the media and political analysts to accurately predict the outcome of an election is nothing new. Right here in the old USA, there was a big scandal about 4 years ago over an election being called before all the votes were cast. I could easily speculate that all the Spanish socialist voters just happen to be late comers to the polls. Especially considering the spanish peoples disagreement with the popular parties' handling of the Iraq war from the beginning.
And then we come to the old correlation versus causation statistical argument. Just because two events happen at the same time, does not mean that one causes the other. You need far more information then a bombing occuring just before an election to prove the bombing influenced the election. No statistical connection can be proven by correlation alone.
In the end, I agree that it is possible that the bombing influenced the election in spain, but there is far from enough evidence to say how probable it is. So if you want to speculate on such a connection, go ahead, but don't try to pass speculation on as fact.