That's Sam Horn's view of the priority of one's view on the Great Tribulation. Listen to it for yourself here, in his sermon from 5/18/08, "The Power of a Promise." Make no mistake, he's staunchly and passionately pre-tribulational. He just doesn't think it's grounds for separation. He doesn't even think it should be grounds for church membership. Brookside Baptist Church's statement of faith doesn't address the issue.
A survey of the statements of faith of other dispensational churches will reveal this doctrine is more commonly understood to be grounds for separation than it ought to be. I applaud Pastor Horn for his clear statement of his convictions on the matter, both concerning his personal eschatology and concerning his willingness to covenant together with those who disagree.