Of course not, but that doesn't change the fact that if you didn't vote for Bush in 2004, that gave one more vote up for Kerry.
Your reasoning is flawed.
Please explain how a vote for candidate B or C can add to the total votes for candidate A.
Here's how - assume these smaller figures to make the point:
election results:
JFKerry - 99 votes
GWBush - 101 votes - Bush wins by 2 votes.
3 Republicans decide they don't like Bush, so they vote for the Libertarian candidate instead.
Now:
JFKerry - 99 votes
GW Bush - 98 votes
Libertarian candidate - 3 votes - JFKerry wins by 1 vote.
Those 3 dissatisfied Republicans just gave the election to Kerry.
Multiply those 3 by enough voters and it could change the outcome of an election.
While the dissatisfied Republicans didn't "add" to the Kerry total, they "subtracted from the Bush total - giving the same result as if you "added" to Kerry's total.
My logic is not flawed - you're arguing semantics - subtracted or added, the result is the same, a changed election.