I can understand why there is a difference in opinions on the subject. In hormonal birth control pills, the hormones DO pass from the mother to the child. However, there have been no ill effects seen in the babies who receive these hormones. In progesteron- only pills/ minipills some women see an increase in breast milk production. In combination/ progesterone and estrogen pills, the danger is that the breast milk supply will decrease.
Ten years down the road medical science may say it causes brain cancer or something dangerous like that but as of now, there has been no evidence that suggests that this causes problems in infants. Only you can decide whether or not to take the risk.