Mr.Ronen Sen, has been involved in the negotiations all these years, and he had put in lot of hard work/bargaining till the agreement was finalised and signed recently by both the Govts.
When he saw the opposition for the deal from the Communists, and BJP also is trying to take advantage of the rift between Congress and the Communists, he must have felt bad, and resulted in his outbust. While one can understand his feelings/frustrations, as a professional, he should have avoided such uncomplimentary words.
The Parliament could express its unhappines over his remarks, but recallng him would be a bit harsh, according to me, for a person who has worked so hard to clinch the agreement.