No, and you can't say why they assassinated the President of the US plus the 51st and 52nd states of Canada and Mexico. There's a lot more to a political assassination than 'he's against us, let's kill him'. They're acting on an agenda, and the assassination is an investment on that agenda. Maybe his replacement is more malleable. Maybe it'll stir up the political climate to put another funded politician somewhere influential. There's a lot more complication to political assassination than you're giving credit for.
So if Hamas kills the Israeli president because he is severely hampering the Palestinian people, in every possible way, this would a good thing? One you can accept? Or is this only the case when someone you agree with kills someone they (and you) don't agree with?
They have a goal which they reach, they might get a replacement that's more mallable (or in any way reasonable at all to the indigenous people of the land) and they better the life of the Palestinian people.
To be completely honest, I can't believe we're seriously talking about what would be a good reason for a political assassination. Where I am from, ANY assassination is wrong. A political one is just more horrendous, no matter how good your cause.
edit:
Give me a bit to play some NBA2K14.
I know we'll never agree, but I'll gladly continue this discussion until the thread is closed