Dan, you lost me this time. Just on the issue of water baptism ALONE, there is no one outside of "ultradispensationalism" who ever wanted anything to do with it on that basis alone, at least as far as fellowship is concerned. Add on top of that when the Body started, how to apply the NT, etc etc etc, and no one wants anything to do with anyone who goes 1 inch beyond Acts 2.
1. The Birth of the Church The Feast of Weeks is specifically fulfilled by the birth of the Church (Acts 2:1-4). It is no accident that the Church was born on the Feast of Weeks or the Feast of Pentecost. It was on this occasion that the Holy Spirit began a new ministry. Some have taught that this is the first appearance of the Holy Spirit, but that is simply not so. The activity of the Holy Spirit is seen throughout the pages of the Old Testament and the Gospels. What was new in Acts 2 was not the coming of the Holy Spirit as such, but rather, a new ministry of the Holy Spirit: the ministry of Spirit baptism. No one was ever baptized by the Holy Spirit throughout the pages of the Old Testament; neither was anyone ever baptized by the Spirit in the Gospels. The first time the Holy Spirit began to do His work of baptism was in Acts 2. It is a unique ministry that concerns the Church and the Church alone. This occasion, the birth of the Church, was the fulfillment of the Feast of Weeks.
That Spirit baptism and the birth of the Church are intertwined is obvious from several lines of evidence. First, it is stated in Colossians 1:18 that the Church is the Body of the Messiah. Secondly, it is stated in Ephesians 2:11-16 that this Body, the Church, is composed of Jewish and Gentile believers united into one Body. Thirdly, it is stated that entrance into this Body is by Spirit baptism in I Corinthians 12:13: For in one Spirit were we all baptized into one body, whether Jews or Greeks, whether bond or free; and were all made to drink of one Spirit. If the Church is the Body of the Messiah, and it is; and if the Body is composed of Jewish and Gentile believers, and it is; and if the entrance into the Body is by means of Spirit baptism, and it is; that in itself means two more things. First, it means that no one could be part of the Body until Acts 2, because only then did Spirit baptism begin. Spirit baptism is absolutely essential for the membership and growth of the Body. Secondly, it means that every believer is baptized by the Spirit. That is why Paul makes this so clear in I Corinthians 12:13: For in one Spirit were we all baptized into one body. The coming of the Holy Spirit in Acts 2 began His work of Spirit baptism giving birth to the Church, the Body of the Messiah. Because every believer is a member of the Body of the Messiah, every believer, at the moment he believes, is baptized by the Holy Spirit into the Body of the Messiah. Therefore, the Feast of Weeks was fulfilled by the birthday of the Church.
2. The Two Loaves The second element by way of messianic significance is to remember that there were to be two loaves offered on a single sheet in the biblical practice of this feast. These two loaves represent two types of people in the Church: Jews and Gentiles, united into one Body (Eph. 2:11-16; 3:5-6). Furthermore, these loaves were to be leavened. Since leaven is a symbol of sin, this means that Jewish and Gentile sinners are brought into the Church, the Body of the Messiah.
3. The Application It was pointed out that the Feast of Weeks is also called the “Day of Firstfruits” because it marked the firstfruits of the summer harvest. The application is that the firstfruits were Jewish believers. For example, the firstfruits of the Church are the three thousand Jews who were saved on that occasion according to Acts 2:41-42. They comprised the Church of that day. Furthermore, James, who wrote specifically to Jewish believers (Jas. 1:1-2), called these Jewish believers “firstfruits” in James 1:18.
The Feast of Weeks is fulfilled by the birthday of the Church that is constituted of Jewish and Gentile believers into one Body. The firstfruits aspect is fulfilled by virtue of the fact that Jewish believers were the first ones in this Body during the first century.