The caricature is a religious allusion to one of the greatest Christian feasts - the Pentecost, when the Holy Spirit descended upon the Apostles of Jesus Christ.
The person sitting at the table is Paul the Apostle, and the Holy Spirit is above his head. The apostle and the Holy Spirit are depicted like the ordinary people of the beginning of 20th century. The poem itself alludes to political events of the period. Both the caricature and the poem lean on religious themes in order to sarcastically allude to the political atmosphere of that period.
Source: The National Parliamentary Library of Georgia