Trust.  The building blocks in communication are a set of facts and one's interpretation of those facts.  Trust influences whether I accept your building blocks.  When people disagree fundamentally, they inhabit different worlds with competing facts.  Even if there are facts common to both worlds, they interpret them differently.  They talk past each other and all the communication they can muster won't produce genuine dialogue.

Loyalty.  Partisanship often clouds the search for truth and frames how one interprets the data.  Political blogs align with a "home team."  You can see this in how casually writers throw around unsubstantiated claims about truth and virtue, forcing visitors to fight uphill against this home field advantage.

Influence.  Apart from coercion there is no controlling other people.  People are influenced.  This is why good parents can turn out bad kids and good kids can come from bad homes.  As long as there is free will, influence is the most you can manage.  What I was witnessing on the political blog was a free-for-all where people wanted desperately to influence others, but were failing because 1) They trusted different people and organizations and 2) They were loyal to different teams.  They were left to conquer and verbally coerce rather than offering invitation and influence.

Here are the takeaways for your world.  Build trust.  Without trust your message cannot take root; it will be seed sown on rocky soil.  Encourage loyalty.  Without loyalty you may end up with silos competing against one another rather than alongside one another, or with individuals who are only in it for themselves.  Exercise influence.  Without trust and loyalty you're left to coercion - you have no influence.  Without influence you aren't a leader - there's no one choosing to follow.  Of course, influence is a two-way street.  The best leaders are learners who are open to being influenced by those they serve.

Do you need to repair trust or loyalty within your organization?  I work with leaders to accomplish those goals.

(To be clear, it is possible for there to be influence based on trust or loyalty alone - but such influence is diminished when compared to situations where both trust and loyalty are present.)