Cameron had little choice but to get involved. Gadaffi was massacring his own people, and we were asked for support. The big mistake is the one we keep making post-Afghanistan and post-Iraq: not committing.
Gadhafi had popular support across most of Libya. Nor was he carrying out massacres in Benghazi. The British government isn't stupid - the military campaign was accompanied (preceded) by a very thorough media campaign which misled a lot of people. Libya was doing very well. One of the few modern nations that wasn't in debt, had the highest literacy rates in North Africa and indeed across most of Africa excepting obvious ones like South Africa. Had the highest doctor to patient ratio in North Africa and other indicators of a country's success. Obviously it wasn't perfect - it's a country in North Africa - but it was a success story for its region. It was also realizing an extensive aquifer program that would have revolutionized agriculture across much of the country. It's biggest mistake was probably investing $1.3bn of its
money with Goldman Sachs who promptly lost it.
https://www.theguardian.com/business/2011/may/31/goldman-sachs-libya-investment
GS were forced to negotiate a compensation deal that would have sold Libya $5bn of preferred shares in themself. Can you imagine GS one of America's richest financial companies and the one with inarguably THE greatest overlap with the US government, having Libya control a significant interest in it? Happily Libya was bombed to bits before any such deal had to be signed and the missing billions appear to have been conveniently written off. It is naïve in the extreme to think that the West had no discussions with the Benghazi rebels prior to their attacks. The UK had oil representatives signing deals with them before the war was won. In fact, negotiations were known to be ongoing with the Benghazi militias even in March of that year (specifically Heritage Oil, a British oil company with strong military connections).
It was said that Gadhafi was "massacring his people". The war began when a militia in Benghazi seized a military base and stole army weapons. They did not enjoy popular support and this was not a popular uprising. They also then seized control of an airport. The Libyan army sent tanks up outside the city. The UK government would do no less if a paramilitary group seized control of an RAF base for example. The UK government then went into overdrive announcing through every possible channel that Gadhafi was massacring peaceful protestors and suppressing a popular uprising. False. Those 'peaceful protestors' had already killed, seized military weapons and were in negotiations with the West already.
The Benghazi forces gained momentum for one dominating reason - NATO forces were willing to spend millions per day bombing any force that was in their side's way and bombing any town that didn't accept their troops. And those troops weren't even all Libyans. A large proportion of the "uprising" was actually comprised of soldiers from Qatar which supported the overthrow of the existing government. And Qatar cheerfully emptied oil depots along the coast and shipped that oil off to sell in return as well. The forces that we were backing were NOT nice people. They massacred Black people and deported them from towns to be killed.
Libya was a nation without debt, successfully improving in quality of life indicators year on year and was influential in trying to bring greater economic unity to the continent of Africa - they proposed using their gold reserves (where are they now?) to back an "African Euro" which would have done wonders for Africa as a whole. They were owed $5bn in shares by Goldman Sachs. They have the tenth largest oil reserves in the world meaning that they could mess with the price of oil at will - the price of oil being one of the foundation pillars of the world economy. And they refused to play proxy for the US control unlike countries such as Saudi Arabia. We in the UK were subject to one of the most heavy-handed and forceful media campaigns against the country we've seen in a long time. The rest of the world sees a developing country that got stomped into the ground by a Western backed force because it was an economic and political (not military) threat to the West.
You can check anything I've said in this post. It's all factual. The only part I can't back up unequivocally is that the Benghazi rebels were in negotiation with the West prior to the beginning of the war. But given that oil deals were being negotiated within around six weeks of the start, and given that Western intelligence simply isn't a group of blind idiots, it's pretty darn
****ing likely.
You know those Japanese in WWII who thought they were winning the war even near the end? We're like that in the UK when it comes to Libya. The government pushed so hard on presenting its preferred view to support war against the country. A war where we spent a million pounds on every cruise missile we fired into that country, btw.
You know what would really blow some people's minds? Libya almost certainly wasn't behind the Lockerbie bombing. The evidence shows that it was likely Iran behind it. The father of one of the victims has campaigned for years to try and get it reviewed as did the MP Tam Dalyell. But not much success. Gadhafi agreed to accept responsibility for it years later in return for the West agreeing to trade deals. Which they later reneged on.
Sadly, when the lies are big enough, those arguing against them are seen as "conspiracy theorists" even when they just post a list of verifiable facts and suggest that the government might use propaganda to make a population accept a war.
Instead we acted as air force to a ground operation consisting of rag-tag militias and then let then walked away leaving them to fall on one another in a chaotic mess.
We have spent around £25m on rebuilding Libya. Of course, that's around a tenth of the amount we spent bombing the Hell out of it.