The mindset of the early Church is not the mindset of 21st century America. The early Christians were there, experienced what they saw and heard, and reacted to it.
Pagan/Jewish sacrifices were made with music. The Christians did not want their sacrifice to be confused with pagan practices. In those days being a pagan was a rule rather exception.
I saw on the news that there was LOTS of music at the Pope's Mass at Nats Park
I ma not sure when the Latins re-introduced instruments into their liturgy, but I wouldn't be surprized to find that it had to do with the Franks.
Unfortunately as a result of secular humanism, liberalism, moral relativism it is becoming the rule again....even to the point of re instituting human sacrifice.