Pat Robertson is an idiot. Not only that, but he's a hypocritical idiot. If we were so hot for toppling dictators, he really ought to stop making millions of dollars off them.
Not that there'd be much wrong with killing Hugo Chávez. If there's one thing Ayn Rand got right, it's this: No dictatorship has any right to exist; any free nation wishing to topple a dictatorship has the moral right (but not the moral obligation) to do so.
Failing that, knocking off the dictator certainly couldn't do any harm.