Dealt subtilly - He acted deceitfully; he used fraud. The cunning or deceitful attempt which is referred to, is his endeavour to weaken and destroy the Jewish people by causing their male children to be put to death, Exodus 1:22.
Our kindred - Our nation, or our ancestors.
And evil-entreated - Was unjust and cruel toward them.
So that ... - For that purpose, or to “cause” them to cast them out. He dealt with them in this cruel manner, hoping that the Israelites themselves would destroy their own sons, that they might not grow up to experience the same sufferings as their fathers had. The cunning or subtilty of Pharaoh extended to everything that he did to oppress, to keep under, and to destroy the children of Israel.