This is from an article about Neo-Calvinism, but the questions can be fairly asked about the Churches of Christ.
Fundamentalism is characterized by:
A.) Insularity. There’s a mentality of insiders over against those who don’t believe.
B.) Distrust towards culture as a place where God is at work.
C.) An “us against them” mentality. Because of the previous two characteristics, fundamentalists typically reject open dialogue. Engagement with culture takes the shape of winning arguments and confrontation. As the insularity builds, there is less and less wiggle room to associate with other Christians who disagree. As a result, a certain form of arrogance tends to infect fundamentalism.
These are the marks of classic fundamentalism. For all the obvious reasons, these characteristics tend to set Christians over against our neighbors. Its dynamic works against a missionally engaged Christianity.
How do we stack up?