I don't resent my colleagues who don't have the same liturgical workload; but I do sometimes resent their attitude about it. (I was too grumpy to reply to the ecumenical colleague who organised a gathering on Maundy Thursday, for example).
Forgive me but I am having a hard time seeing the point of organizing an ecumenical gathering at any time during the Paschal Triduum or Holy Week as a whole (since many churches have daily services during Holy Week, and Eastern Catholics, for example, will have Bridegroom Matins on the evenings of Palm Sunday, Holy Monday, Holy Tuesday, and Holy Wednesday, and with the exception of the Ukrainian Greek Catholics, Belarussian Greek Catholics, Russian Greek Catholics and a few others, the majority are on the Gregorian Calendar, as are many of the Oriental Orthodox, and frequently, when Gregorian Easter occurs late in April, the two calendars agree on the date of Easter. So naturally clergy are going to be super-busy during Holy Week, and having an ecumenical gathering during either Gregorian or Julian Holy Week will at a minimum exclude some clergy.
Frankly, scheduling an ecumenical gathering during Holy Week strikes me as re-enacting the Great Schism of 1054 and the Fourth Crusade in Pantomime, in that it comes across as almost passive aggressive.
There are of course a few exceptions to this. For example, I first met my retired friend Fr. Steven Dean of the Episcopal Church at a joint Methodist-Episcopal ecumenical service on Holy Friday, where I also met Rev. Lou Fry of the UMC, who was also a good friend - he was the pastor of a beautiful Methodist church that the congregation built with their own labor in the 1970s when they outgrew their historic 1920s building (which sadly became a performing arts center, unlike its counterpart in the adjacent town, where I was baptized, which was built in the late 1950s* to replace another 1920s church albeit of simpler architecture, and that original church was sold to the Baptists, who still operate it.
So basically if two churches closely related, for example, two Orthodox churches, or two Mainline Protestant churches, or two traditional Protestant churches that are not rivals, like say, WELS and ACNA, but rather allies, like LCMS and AALC, or the PCA and OPC, have a combined ecumenical service, particularly where they might not be able to fill their individual churches, for example, the Good Friday service, which was not well attended compared to Maundy Thursday, that can make a lot of sense and also help to connect the larger Christian community and reduce the workload for clergy.
*The late 1950s parish where I was baptized has particularly gorgeous stained glass windows which combined with the fairly high church wording used for Holy Communion so as to convince me, even though this was not Methodist doctrine, which on this issue is undefined, of the Real Presence, by the time I was seven, and also made me a lifelong iconodule, to the point that when I visited an SDA church to sing in a Christmas program with some other children including the daughter of the Armenian family that I grew uo in close proximity with, which my mother had compiled from certain classic hymns, I, noticing the lack of a cross, naively offered to their extremely friendly pastors to make one for them, and fortunately they were gracious rather than polemical in their reply.
As far as I am aware, the old parish church sold to the Baptists has stained glass windows but not of the same iconographic calibre; specifically the 1950s church uses a style of stained glass windows on the eastern wall, which faces the liturgical North, which uses elements like halos in a manner that is very Byzantine, while retaining a Renaissance-influenced realism in the faces and composition, while those along the aisle on the liturgical south wall in a less realistic style more evocative of Western iconography from the 10th-15th centuries.
