Also, posters scoff at beliefs being "infectious" but peoples political ideology and social outlook absolutely can be changed and influenced? It's not really something to joke about to be honest.
Quite a crucial point in this discussion.
Yes, ideology and outlook can be changed and influenced. Thank fuck, eh, or we'd have no hope of ever changing anything!
There does seem to be an emotional, tribalist way of thinking about beliefs, thoughts, ideas, that suggests that someone is at risk of having these changed if they associate wth anyone with different views. As if ideas have some kind of mystical power to accidentally fall into our heads and change our views against our will.
I'd say that yes, we should be open to changing views, of course we should - I try to listen, research, assess and base my views on information and reason. What's the alternative? Clinging to a view because our pals have it, or it's fashionable, or a certain newspaper says that's how we ought to think? No, that's not for me.
Listen to everything, assess it all, test it out, think it through, try it from different angles. Allow for the fact that you might be wrong, allow space to change your mind, allow for the fact that others have different views.
As for influence and 'brainwashing' and infectious thoughts ... humans are susceptible to groupthink, and persuasion. We learn how this works and we exercise our muscles of cognitive abilities by the process I've outlined above. One becomes aware of blind spots, weak areas in reasoning, etc, by testing it all ou in discussion - and not just with those we agree with!