Purely more speculation on your part. Maybe they just felt it was inappropriate to keep a political sign like that up at a time like this?
And maybe, just maybe, this last incident (one of many violent attacks against those on her "hit list" BTW) was the one they thought was going to be the final straw.
Vandalism (including of Gifford's office 24 hours after that was posted), some idiot cutting a gas line at what he thought was another targeted Congressman's house (the posted address was wrong), and death threats and violence against other Congresspeople didn't make them take it down.
Whose opinion will you listen to? How about Congresswoman Giffords? She summed it up pretty effectively back in March:
?We?re on Sarah Palin?s targeted list, but the thing is, that the way she has it depicted has the crosshairs of a gun sight over our district and when people do that, they?ve gotta realize there?s consequences to that action.?
Palin, meet consequences.
Anyone who knows anything about guns knows you always treat one like it's loaded and you never aim one at anything you don't want to shoot. They also know bullets can travel far beyond their intended targets.
The Congresswoman that Palin drew crosshairs on just got shot, 6 innocent people are dead, and 13 others are injured.
No amount of spin is going to change those facts.
I agree - they also might have guessed (correctly) that the left would use it against her no matter what the facts were.
I could give a rat's arse about the politics. The facts are that when you advocate violence, you run the risk of being responsible for the violent incidents that result.
Maybe its not about left/right, but THAT YOU SHOULDN'T ADVOCATE VIOLENCE.