<rant>
I get really annoyed by people who say the UK is like a third world country. It isn't. In a third world country, you have no decent roads, no clean water, you live in fear of disease, rape, famine, militia violence and all sorts of nastiness. Last time I checked few people in the UK haven't lived like that for at least 200 years.
</rant>
Back on topic: I feel getting rid of him was both good and bad. While he was a nasty piece of work, he kept order in Iraq, while the string of democratic governments haven't. When he went, all the various Muslim nutjobs went at each other and almost tipped Iraq into a civil war, because they knew there was much less chance of recrimination.
But by your logic, we should all go and take out Mugabe next. Just because someone is an evil dictator, doesn't mean you have the right to invade their country.