Odds are a survey of DoC, independent Christian, and Church of Christ (non-instrumental) congregations will find a surprising commonality of beliefs across a quite predictable spectrum.
I can't say for those other Church of Christ operations that are not "non-instrumental". I've always thought of most of them as pretty much the same as independent Methodist operations ~ we have one in the area with infant baptism, and that's definitely outside what the Christian church does.
That are a number of differences between the Church of Christ and the group that you continue to want to associate them with. You need to learn these differences is you are going to expound on the subject.