The fire that people often refer to was in 1922 at the Four Courts during the civil War, but did not effect Civil records (i.e. BMD certs), or Catholic records.
Not all births were registered in the early years, and it's possible your Bartholomew is among these. Having parents names would help confirm or rule out those possible matches,and using a parent search can some help locate possible births for sibling instead, and get your search started.
One of those births shown on the BMD Index may well be a match for your Bartholomew, it's just a case of locating evidence from US records to try to prove one of them as being 'your' Bartholomew