While many seem to believe that all the Churches of God are the same, this is not so. In the end time, most true Christians are Laodicean and not Philadelphian. In this sermon, Dr. Thiel mentions over 50 prophetic errors that Laodiceans, independents, and some of the remnant of Sardis have held to. Dr. Thiel also mentions scriptures that Laodiceans and other non-Philadelphians miss. Dr. Thiel cites scriptures such as Zephaniah 2 related to gathering together before it is time to flee. He also mentions that Jesus only promised to protect the Philadelphians from the coming 'hour of trial.' Furthermore, Dr. Thiel mentions that unless they change, Laodiceans will not know when the Great Tribulation will begin until after it is started, and hence too late for them to flee prior to its beginning.
A written article of related interest is available titled "Do You Hold to Any of These Laodicean Prophetic Errors?"