If I was going to answer honestly it's mainly a lack of information for me combined with the fact that even if I did research it to have a fully informed opinion and expressed support it would do very little on a forum like this. Unfortunately most people discuss what is close and relevant to them, which for the majority of posters on here would be Brexit I believe and the British Isles + Ireland.
Personally in terms of Chile, while conditions may have deteriorated and people are suffer, violent protests rarely end well in the long run and lose you support. My girlfriend is from Sudan and their peaceful protest appears to have achieved more (hoping it continues) then the violent protests in other African countries. However I really don't know enough about the issues.
As for Barcelona, I stick with my previous argument that violent protests aren't the answer. I also believe that nationalism is an antiquated ideology and that humans need to move past such narrow labels that separate them. Independence movements such as Barcelona and even Brexit only deepen divisions between people when we need to start putting aside such petty differences such as where we were born. It's one of the main reasons I support the E.U, even if it does need reforming, is that it's united existing countries far more than any other previous organisation.
Finally as for Mexico, I believe you are referring to the drug lord's son and the armed fighting on the street. Mexico has had a terrible problem with drug lords in that they are so powerful and parts of the police/politics are so corrupt it's hard to eliminate them completely. However any fighting that could be termed a war, for example a war on drugs that leads to fighting in the streets is likely to lead to innocent people getting killed. I don't think it was an easy choice to let the son go, but I think there were larger considerations than simple arresting a known drug lord.
Other examples of news around the world would be Thailand's King gaining more and more power, taking the country closer and closer to an absolute monarchy. Turkey's offensive in Syria, where Erdogan has turned himself nearly into a dictator with his changes to the power structure and the facts that the Kurds are constantly being abandoned by western powers after they have helped them in the region.
Put it simply, there are huge problems across the world and that's before you take into account we might be heading for global warming crisis that affects everyone. There are terrible things happening across the world, but until humans actually start working together to benefit each other and put aside their differences then those with power will continue to abuse their positions and the majority of those with wealth and power will seek to protect it, whilst those below just look after themselves and try to make the best of what they have. It's human nature that we need to overcome, but are unlikely to do so.
