I am a John Stewart Mill fan. His thesis in 'On Liberty', as I see it, was basically that we should be free to do as we wish, as long as it does not harm others or prevent them from doing as they wish.
I think this is a good definition of freedom. Of course, the problem is defining what we count as harm. Drinking is a good example. For some, it makes them laugh, and maybe sleep
For others, it may provoke an aggressive reaction. How can I realistically expect that people would accept that their freedoms should be more curtailed than others? i.e. that I can drink, but my neighbour can't - because when I drink, I cause no harm, while when my neighbour drinks, he often does! One of the strongest beliefs a lot of people have is that everybody should be treated the same. The law expects this too. I suppose this is the result of living in large democracies, laws cannot be individualised, lol, and the advantages of government outnumber the disadvantages.
To move onto your examples, you do ask a lot of good questions. My general belief would be like Mill's - if no harm is being caused, it is none of our business to disagree. For example, if I were being forced to work on a Sunday, and it conflicted with my religious beliefs, to me that would count as harm. If I am simply
offended that others work on Sundays, to me, that is different from harm, and must simply be tolerated.
I must admit though, even with my own 'guidelines' I find it difficult to answer your question -
Do we have the freedom/right to impose ourselves on other nations, for any reason?
Initially I would say no, it is patronising and completely wrong. But where people are being harmed by a regime, it is not wrong to wish to change that. To decide that a different nation should adopt
my views is a different matter all together.