A. I am not a progressive Adventist.
B. I was for a time a progressive Adventist. Before that I was a traditional Adventist, and an Adventist pastor for 10 years.
C. I still agree with a lot of views of progressive Adventists.
You have to understand some things about the Adventist Church to understand this forum.
The Adventist church did not always have 28 fundamental beliefs spelled out as they do now. They had certain "pillars" or key teachings. But in recent years Adventism has sought to spell out in more specifics a greater number of teachings.
Those joining the church before 1980 were not required to hold to the set of beliefs that is now required. Many of the beliefs would be the same. But the notion of fundamental beliefs that take on a creed-like identity is more pronounced in recent years.
Progressive Adventists see that the Adventist church has a role to play in the world. They value the elements of Adventism's history that allowed people to diverge from the common views and study for themselves. But they do not value the dogmatism that has developed at various periods of Adventism, and they do not value defining a great number of topics so that everyone must subscribe to the party line.
The Adventist church started out with the notion that creeds are bad. Corporate agreement with a creed limits examination of closely held beliefs.
The best way I can put it is that Adventism in its early days re-examined many things and focused on "present" truth. Ie. they thought truth progressed. Progressive Adventists hold to this spirit of continued advancement in truth rather than focusing specific historical Adventist beliefs. Many of the historical Adventist beliefs they find may not be correct after further research.
They like the original spirit of Adventism. But they often find some of the beliefs of early Adventism to be wrong, simplistic, proof-texted or in some cases downright wacky.
The reason progressive Adventists and former Adventists who have left over doctrine have so much in common is that they have all wrestled with the same questions regarding their Adventist faith and have found some aspects of the traditional interpretation lacking. They just take different paths to dealing with that in their daily life.
Formers feel they are better off with another church. Progressives still value their experience in the church enough that they remain. Some seek to change the church from within. Others just enjoy the cultural aspects and still worship along with Adventists without necessarily feeling a need to change the system. Some feel that the church still has a larger purpose, that it can contribute to Christianity, but not necessarily in the area of Adventist disctinctives.
But they all have wrestled with the doctrine and found things that they can no longer agree with in the overall fundamental beliefs of Adventism.