Sentence:  They think a new <WSD>Pentecost</WSD> is afoot, in which the Holy Spirit brings millions the good news of salvation in the hereafter and real blessings in the here and now. 
Meaning of the word marked with <WSD> tags:  the particular (Jewish) Pentecost 49 days (inclusive) after the resurrection of Jesus on the (Jewish) Day of First Fruits, when (in Christian teaching) the Holy Spirit descended upon the Apostles with miraculous effects including the ability to explain the Gospel intelligibly in languages they did not know; or a similar occasion since