If I may venture my opinion, it is a humble opinion, but it is also the opinion of one who is recently departed from being a minister in a church that you could easily label as Pentecostal or at least Charismatic. - You may try to approach this from the angle of looking at what the early church was really like.
Pentecostals and other Charismatics are always drawn back to that infant Church, as previously stated by someone they take their emphasis from the 2nd chapter of Acts and from 1st Corinthians. They see these as being basically the only guide to what the church was like.
Remember first they are mostly coming from a sola scriptura angle so for the most part they don't have any other reference to what a church service was like. Sure they have the whole New Testament but the gospels are pre-Church, Acts is more about the missionary journeys of Paul than about actual church actions and, I think, only one reference to a service. The letters are more about behavior, doctrine except that one part of 1 Corinthians. We see liturgy in Revelation but to a Pentecostal or any Protestant, generally speaking that's too wrapped in vision, symbolism and Heaven to have any practical meaning for a Church Service.
Second, as Pentecostals/Charismatics they are coming denominationally from a Protestant and therefore an anti-Catholic heritage. Some are, of course far more overt in this, but even they very nice "God loves everyone even the Catholic", types still have this in their history. Therefore, anything that looks Catholic must be a corruption. Even those who have read some of the Church Fathers and seen the references to Liturgy would likely view these as things put upon the Church by that "evil" Emperor Constantine. Or if not by him (because they actually read enough to see that it was there earlier than him) then the Church must have fallen off the rails as soon as the Apostles died, because in no way could it legitimately in any form resemble the "Roman" church.
To Pentecostals the early church and the "true church" has always met in small hidden groups in peoples homes praying, listening to someone preach, and singing songs. So it was in the 2nd chapter of Acts so it was for their own founders around 1900 and so it must have been for those "true church members" who spent all those centuries evading the persecution, first of the Roman Catholics, and then of the non-Spirit filled Protestants. See it wasn't Martin Luther who really restored the Church in their view, yes he gave back "salvation by faith alone", but he didn't have the Spirit. That didn't happen til about 100 years ago. That, in their view, was the true restoration of the Church. (Unless your one of those who believe it's still being restored, gotta get that full 5 fold ministry and all that.)
What they fail to see, despite the fact that many are very very pro Jewish, is the fact that the Church at that earlist time wasn't the Church. It was a Jewish sect, and the Jews both in the Synagogue and in Temple were very liturgical. Once one understands this then introduce the Church Fathers, and you can begin to see in their writtings how the early church was a continuation of that Judaism, now with the addition of the Messiah. You can also then see how the modern Orthodox Church is a continuation of that. But without making that connection, they will go on forever seeing the early church as something other than what it actually was and as a result of that anything that you say will be wrong because your one of those poor deceived, corrupted, descendants of Constantine.
At least that's my angle on it of course like anything human I'm sure it wont be anywhere near this simple, but perhaps its a start.
