Misti, I agree with everything you wrote this morning. On these threads I sometimes get painted as a loony commie dinosaur (something Corbyn's getting used to!) but that's an unintelligent interpretation by people with poor understanding of politics and a rigid black-and-white view. I'm a capitalist with a conscience, which I believe makes me middle of the road.
Unions need revitalising and their legal shackles removed. This is because unions are collectives, and it is only by working together in groups that normal people can have any power - the entire basis of Corbyn's premise, as it goes, and the underlying principle of democracy. Unions in the 1970s were facing the gathering forces of mega-business which are now baring their teeth. Strong responses were needed.
The historic patterns of union behaviour - locked shops in particular - had developed 100+ years previously, when there were no workers' rights and business owners worked together to deviously & violently exploit them. You only have to read Dickens or watch some of the many films about the struggles. By the 1970s, some union bosses were megalomaniac nutcases but most were intelligent, highly informed and determined. The way British coal and steel closures were executed proved them right, not stupid.
Now the historic pattern has been broken and everybody knows the world's changed. The ongoing war on 'everyone' by 'the capital' continues, however, and is speeding up very worryingly. If any poster thinks it's great that 1% of people own 48% of all there is in the world and will have more than half of it by 2020, they'd better be in the 1% and have a serious addiction to solid gold shoes with diamond heels. If anyone thinks those few care about other people's health, education or children, they haven't been paying attention.
But the 1% can't get all that stuff unless we sort it for them, so we need to use our bargaining power. This is true on a global, national and individual level. When we pull together, we are able to hold something back. There are lots of ways of doing this and unions are one way to organise combined efforts efficiently. Corbyn wants us to develop all the ways of working together to improve one another's lives.
Sorry, that turned into a ramble 
On Trident - Britain isn't a superpower any more. We're a second-class nation. Having nuclear weapons makes us more of a target than not having them. My opinion on this has reversed as we changed our position on the global stage. The majority of our assets now are intangibles, which can't easily be bombed. I would alter my view again if we discovered socking great oil deposits, for example. I do think we should have top-class militia, just not WMDs. And releasing the Trident money could help out our struggling forces.