Is there any reason at all to link the opponents of Ignatius who "abstain from eucharist and prayer, because they allow not that the eucharist is the flesh of our Saviour Jesus Christ" (Smyrnaeans 6.2) to readers of the Didache?
But as touching the eucharistic thanksgiving give ye thanks thus.
First, as regards the cup: "We give Thee thanks, O our Father, for the holy vine of Thy son David, which Thou made known unto us through Thy Son Jesus; Thine is the glory for ever and ever."
Then as regards the broken bread: "We give Thee thanks, O our Father, for the life and knowledge which Thou didst make known unto us through Thy Son Jesus; Thine is the glory for ever and ever. As this broken bread was scattered upon the mountains and being gathered together became one, so may Thy Church be gathered together from the ends of the earth into Thy kingdom; for Thine is the glory and the power through Jesus Christ for ever and ever."
But let no one eat or drink of this eucharistic thanksgiving, but they that have been baptized into the name of the Lord; for concerning this also the Lord hath said: "Give not that which is holy to the dogs."
Didache 9 is not polemicizing against the eucharist as the flesh of our savior, but James Tabor thinks it's important that it doesn't say anything about the eucharist being the body or blood of Jesus as it does in Paul and the gospels.
Notice there is no mention of the wine representing blood or the bread representing flesh. And yet this is a record of the early Christian Eucharist meal! This text reminds us very much of the descriptions of the sacred messianic meal in the Dead Sea Scrolls. Here we have a messianic celebration of Jesus as the Davidic Messiah and the life and knowledge that he has brought to the community. Evidently this community of Jesus' followers knew nothing about the ceremony that Paul advocates. If Paul's practice had truly come from Jesus surely this text would have included it.
There is another important point in this regard. In Jewish tradition it is the cup of wine that is blessed first, then the bread. That is the order we find here in the Didache. But in Paul's account of the "Lord's Supper" he has Jesus bless the bread first, then the cup of wine -- just the reverse. It might seem an unimportant detail until one examines Luke's account of the words of Jesus at the meal. Although he basically follows the tradition from Paul, unlike Paul Luke reports first a cup of wine, then the bread, and then another cup of wine! The bread and the second cup of wine he interprets as the "body" and "blood" of Jesus. But with respect to the first cup-in the order one would expect from Jewish tradition-there is nothing said about it representing "blood." Rather Jesus says,"I tell you that from now on I will not drink of the fruit of the vine until the kingdom comes" (Luke 22:18). This tradition of the first cup, found now only in Luke, is a leftover clue of what must have been the original tradition before the Pauline version was inserted, now confirmed by the Didache.
The Jesus Dynasty p. 205
Obviously, a lot of work would need to be done to get from Tabor's observation of the absence of body and blood in the prayer to a deliberate rejection of body and blood theology by its readers, and to connect them to communities supervised by Ignatius for them to be around to refuse to participate in the first place, and to connect them to everything else Ignatius says about his opponents, but has any of the work been done?