Remember that Calvin et al surfed the wave that was Luther. That Calvinist churches should now try to lay claim to the reformation and to protestantism, much less something "classical protestant," is anachronisticwell put. it is sad that nowadays the followers of Calvin try to say that they alone are Protestants.
====>The followers of Calvin consider the Christian Protestants who do not follow Calvin (like Lutherans, Pentecostals, Anglicans, Methodists, etc.) to not be true Protestants.
In fact the OPC says this about those who deny the non-scriptural double-predestination, God pre-damns people idea of the followers of Calvin. Hence they condemn followers of Christ like Methodists/Pentecostals etc. here is a quote from their site
Arminianism is indeed a heresy,....Some moreOPC attacks. This is from the OPC Q&A site
The Bible teaches that Christ did his atoning work on behalf of his elect people, and no others.....
Since the teachings of Arminianism are contrary to Scripture, they are manifestly false. They are serious perversions of the gospel of Jesus Christ.
Are Arminian preachers heretics? In a sense, yes,
Is Arminianism a damnable heresy? Yes.
This states clearly that the OPC wishes to believe that the sending of the Holy Spirit is UNREPEATABLE
It will be noted that the Confession sharply contradicts the view popularized today by the neo-Pentecostal movement. In essence this view would have us believe that we can have the same charismatic gifts that we read about in the age of the Apostles - such as prophecy, speaking in tongues, and healing - today. This is a very serious error. In essence it is a result of a failure to grasp the Biblical teaching concerning the history of salvation. Never again will there be an outpouring of the Holy Spirit such as took place on the day of Pentecost.
The sending of the Holy Spirit is just as much an unrepeatable event as the birth of Christ was.
And According to the OPC OrthoPresbyterianC: "Christians should not celebrate the Seder or other Jewish festivals. "