in the Christian community"
These existed long before my time among people who were so sure (smug?) of their separate beliefs they were willing to torture and kill their opponents. That goes on down to this day in central Europe in a three-way: Muslim, Roman Catholic, and Serbian and other Orthodox. Some of those involved who claim "true Christianity" are now facing war crimes trials. As to their nominal leader, this was said of him: "No stately form does he have, nor any splendor; and when we shall see him, there is not the appearance so that we should desire him ... He was despised and was avoided by men, a man meant for pains and for having acquaintance with sickness ... He was despised, and we held him as of no account ... Jehovah himself has caused the error of us all to meet up with that one ... a ewe that before her shearers has become mute, he also would not open his mouth." (Isa 53)
Rather than judging another his enemy and killing him, he died for people he didn't even know. (John 13:34,35)
Peter, "the first Pope", said, "In fact, to this [course] you were called, because even Christ suffered for you, leaving you a model for you to follow his steps closely." (1 Pet 2:21)
Jesus left specific instructions about prayer, which Paul later understood this way: "For there is one God, and one mediator between God and men, a man, Christ Jesus" (1 Tim 2:5) What do you find when you compare this with your catechism book? Agreement with the bible, or division from it? Confirmation of Jesus, or division from him?
When you are about to pump diesel fuel into your car, and a bystander points out the mistake, is he guilty of 'negative and disrespectful' conversation?
Even in small things there is appalling ignorance of the very book that people claim as the word of their God, whomever he or she or it are (sic). Example: One of the sponsored links above says, 'there are two people named Jesus in the bible. Do you know the right one?' In fact, there are four, and three in the "New Testament". Is it 'negative and disrespectful' of me to point that out? If you were about to click on that link for "accurate knowledge" of God, have I rained on your parade? (The unforgivable sin, according to many.)
"the Christian community which , after all, has the Gospel at its center"
Where do you see such a community? And it's out of "the" Gospel that about a billion people are sure of the "Mother of God" while another billion find no such thing.
"The Catholic (and Anglican) Mass can be held without a building or icons, as on battlefields in times of war. So can the services of the other congregations."
But not ours; none of the soldiers are Jehovah's. According to many, this also is a bad thing. Is it to you?