I wrote about some of the errors of Alpha in The Spirit of Prophecy. Cecil Andrews also does an excellent job of exposing some of Alpha’s errors.
I am not entirely sure of what Mr. Andrews’ view of eschatology is, and so I can’t endorse him on his view of the End Times, but this expose of Alpha is biblically correct;
The church where I was Baptised, Emmanuel Baptist of Barrie, does the Alpha course, and that is one of the reasons we left. Another big error is their support of Rick Warren, and his purpose driven apostasy. Another one would be the Evangelism Explosion class we attended where the speaker was raving about “the Shack” as a good book to use to understand God!