Pumba's quote is only part of the whole text.
We welcome our fellow Christians to this celebration of the Eucharist as our brothers and sisters. We pray that our common baptism and the action of the Holy Spirit in this Eucharist will draw us closer to one another and begin to dispel the sad divisions which separate us. We pray that these will lessen and finally disappear, in keeping with Christs prayer for us that they may all be one (John 17:21).
"Because Catholics believe that the celebration of the Eucharist is a sign of the reality of the oneness of faith, life, and worship, members of those churches with whom we are not yet fully united are ordinarily not admitted to Communion. Eucharistic sharing in exceptional circumstances by other Christians requires permission according to the directives of the diocesan bishop and the provisions of canon law. . . . "
Scripture is clear that partaking of the Eucharist is among the highest signs of Christian unity: "Because there is one bread, we who are many are one body, for we all partake of the one bread" (1 Cor. 10:17). For this reason, it is normally impossible for non-Catholic Christians to receive Holy Communion, for to do so would be to proclaim a unity to exist that, regrettably, does not. We welcome our fellow Christians to this celebration of the Eucharist as our brothers and sisters. We pray that our common baptism and the action of the Holy Spirit in this Eucharist will draw us closer to one another and begin to dispel the sad divisions which separate us. We pray that these will lessen and finally disappear, in keeping with Christs prayer for us that they may all be one (John 17:21).
"We also welcome to this celebration those who do not share our faith in Jesus Christ. While we cannot admit them to Communion, we ask them to offer their prayers for the peace and the unity of the human family."
As a side -- Members of the Eastern Rite Churches are welcome to partake of Communion as long as it is approved by their own church and they are comfortable doing so.
Otto's Doll -- I commend you on taking the time to even ask the question. Usually there will be a statement in the missal or the handout at the funeral but, of course, not everyone reads it. As a practicing member of your own church I'm sure you know how to show respect during the Communion by offering your own prayer for the deceased and their family. Some non-Catholics may go up to Communion and they may even be given Communion. Most priests/deacons/Eucharistic ministers will not make an issue of it, especially during a funeral or wedding. But, you will be correct if you refrain from going to Communion.