Is there any event more deliciously communal than the death of a polarizing figure?
Those who love you have the chance to sing your praises. Those who hate you a chance to stomp on your grave. The former the chance to deny the latter their joy--all in the name of decency, of course. The latter the opportunity to bask in the sheer force of their conviction. All while the indifferent get to revel in the simple pleasures of falling for neither hero-worship nor the unseemly impulse of schadenfreude.
Satisfied self-righteousness for all! There's even room for the odd columnist (or blogger!) to craft a few clever words and pretend he's somehow above it all, even when he knows deep down and damn well that he is not.
So, regardless of how you feel about the late Mrs. Thatcher: enjoy the day. It's rather hard to see how you couldn't.