Dollar is dead, Paul. And while I haven't read Dollar completely, I don't think pointing out apostacy and compromise in the church is causing sinful division. If it was, then we would have problems with Paul who did the same thing often under the command of Christ.
But UTHZD, were you at Western Seminary or Western Conservative Baptist Seminary? I think these are two different places. Western CBA was entangled, I believe, in the issues that led many to split from the CBA over the issue of compromise. Remember, Dollar wrote back in the 70s. I don't recall all the issues, but I think that is what he is talking about. Research the history of the CBA and Western. You might come up with something.