Of course they have what they consider to be good reasons, but it seems quite clear that these reasons frequently bear little or no relation to what we are told publicly.
I agree - but should they? I know in an ideal world they should be able to tell us everything and be completely honest but I feel the world is far too complicated a place for this to be practical and reasonable.
The Iraq thing is the most frequently cited. It's now abundantly clear that Sadam had no WMD's but I feel the crucial issue there is that we were not told he did through a deliberately desire to fake an excuse but through a collection of blundering incompetence and crappy intelligence. It's still crap, and it's still hardly acceptable, but I feel the motive is very important.
In a straight fight between blatant deceit and incompetence I kinda prefer incompetence.
And they will support the toppling of some 'evil dictators' yet give full political and financial backing to others. Just as they backed Saddam Hussein, the Taliban and Gaddafi at one time.
And this is the stuff for which we'll never know the background. I'm sure backing Saddam made sense - at the time. The problem of course is that as we sit on the internet we can be armchair Presidents using the weapon of hindsight. It's all rather different at the decision table at the time, I'm sure.
I'm still not sure whether we should have been involved in Libya at all but I can at least see why we were - we'd have been condemed just as much had we sat back and watched him attacking people with fighter jets and said 'Not our problem' as we are now being for interevening. And yes - Syria - lots of flack for not getting involved but I'm probably one of the few who thinks we are not involved simply because we lack the capacity not because we lack the will.
Had the uprising not started I'm sure Gadaffi would have been less of a problem in the future than at any point in the past - relations were clearly improving - but once you start mowing people down for protesting using Jet Fighters you kinda cross into the point of no return.
Can you imagine if we'd bombed the rioters?!

but tbh we did need to step in and help, what are we if we promote democracy and then stay silent when a nation is fighting for it.