I chose 3, 4, 5, and 8 in answer to the question, "May Christian's talk about politics?" Not "Should..."
I'm certainly fine with groups that don't talk about politics. I would feel really alone and perhaps bored in such groups, but I don't think I could could conscientiously encourage anyone who is not so interested in politics to get more interested in politics. That is not a NT theme. We are encouraged to pray and that can be done without knowing very much at all.
However, I think it is good for at least some Christians to be familiar with what goes on in the political world and if someone desires to know more in order to be a more effective ambassador and servant of God I might encourage them.
Now if someone doesn't know much about politics and uninformed statements and decisions about the little bit that he knows, then I would think he should learn more or quit making comments about something he knows very little about.
“The person who loves their dream of community will destroy community, but the person who loves those around them will create community.”
― Dietrich Bonhoeffer, Life Together: The Classic Exploration of Christian Community