[tomjen3]

It wouldn't even work. Reread the news you found that you agreed with - how much of it is simply restating the same basic things and calling the other side evil, stupid, etc, at least indirectly?

If somebody with different believes than you were forced to read those, do you think the resulting society was more or less polarized?

The kind of content you need to do that is already disadvantaged since it has to be toned way down, and that makes it less much less likely to be shared in the first place.