Should I stop thinking about the possibility of WW3 so I won't be so depressed/paralyzed & can do what I need to survive in my own life?

Even though life is difficult and complex, I think I have a "grip" on it and can do what I need to survive and even be quite happy with my life. However, when I read the political blogs and newspapers etc. - which I do a lot - along the whole left to right and vice versa spectrum - I get worried about the state of political affairs on the planet and about the "global" war that seems to be happening right now. If I'm realistic, it doesn't look to good. It's one of those situations that makes me want to pretend to believe in a caring/directing God so that I will feel safe - someone up there is protecting me etc.

My point is: Should I be realistic about politics - i.e. not in denial - even if it depresses me to the pont where I can't enjoy my own life - after all the "bad things" I think I see coming - e.g. triumph of fundamentalist-totalitarian/anti-woman Islam/Sharia law etc./perhaps eventual progress back to this point but could be back to the "dark ages" for 400 years etc. - MAY NOT - at least not all - happen and I may be missing enjoying my life because I'm thinking too much about things that are not definitely going to happen.

It all boils down, I guess, to being able to control the focus of one's mind to have the best survival option at any one time. Still this issue is a problem for me at the moment.

Consequences of different beliefs - Telling a lie about telling the truth & vice versa.

It's said that "beliefs have consequences" and I find it interesting to think about what different consequences different beliefs have - e.g. what are the practical consequences of "adopting" the Muslim, Christian (Catholic versus Protestant, Evangelical) etc., Jewish belief "sets". This sort of relates to quantum ideas, I guess - what difference does the actual relationship of the "belief sets" to "external reality" (to the extent that such a thing exists - if a tree falls in the forest etc.) have on the holder of that particular "belief set". Is it better to have some "belief set" rather than none - even if that "belief set" is not exactly congruent with reality? Do we have to lie to ourselves about the truth to make it bearable ("You can't handle the truth!")?