How does the text dramatize the character, Blancandrin, within the first 40 Laisses of the Song of Roland?

The picture the reader receives from the character, Blancandrin, thus far is a picture of dishonesty, treachery, and remorselessness. An overall opposite of the French "perfection" emerges from this paynim character. 

Dishonesty - We are first introduced to Blancandrin, as he proposes a plan of deceit to fool the French Lords into believing the Paynims have "submitted unto the Christian law. (ll. 38). His opening act is an act of dishonesty.

Treachery - The Song shows Blancandrin to be treacherous and just overall deceitful. Specifically in the text we see Blancandrin hail God (capital 'G') when addressing the French. "God give His grace to you/ The glorious God to whom worship is due (ll 123-124)."  However as Blancandrin, comes before the paynim king Marsilion, he exclaims "Save you, sir, by Mahond,/ And by Apollyon, whose blest faith we extol! (ll 416-417)". Here we find Blancandrin is unfaithful even to his God. Also we learned previoulsy in the Dominick essay that the greatest sin according to the 11th Century Frank was to deny God. Blancandrin takes treachery to a whole new level.

Remorselessness - One idea that has always been unchristian is the practice of 'sacrificing children'. The children of Israel were defined by the fact that they never sacrificed their children like other nations. When the text claims that Blancandrin was planning on having his children killed in his deceitful plan of fooling King Charles, this is yet more proof of how the paynims are the opposite of the Christian Franks. The fact that Blancandrin readily states the necessity of his "sureties' heads [being] smited off with an axe (ll 59)" proves Him to be heartless.