Receiving blessings for a baby at a temple My cousin just had a baby two months ago, a beautiful baby boy. The father is a catholic and my cousin, the mother, is a Buddhist. They have taken this two month old baby to a very sacred Buddhist temple to receive blessing from the relics of Buddha and to give alms.

One of the chief monks blasted them both, threatening them that they'll never be given permission to give alms or enter the premises: because the baby is only 2 months old and apparently should not have been brought to a sacred place. 

Hearing this story made me so upset. On their way home they have visited a church where the reverend Father had welcomed them both and blessed the child. 

I really want to do something about it but I just don't know what to do?

This should be fixed. This is not the way monks should behave in sacred places in the presence of the relics of Buddha.
The Supreme Buddha has said that each and everyone should be responsible for good and bad one does.  According to this we can imagine the plight of this monk (I should not be calling him a disciple of the Buddha).  Be it Monks or laymen, that kind of actions (because it is done in the name of Supreme Buddha’s dispensation) will amass enough demerit to suffer in hell.   This is his own making.  We can only have pity on him and hope that someone will try and show him the gravity of the mistake that he has already made and that he will correct himself, which is highly unlikely. That tells us that the robe or the shaved head do not make a monk, ie. By that I mean a disciple of the Supreme Buddha.