The Jehovah Witnesses have a very iconoclast-ish version of worship and veneration - namely they can’t tell the difference. Catholics and Orthodox both know the difference, which was pretty much outlined at the Seventh Ecumenical Council. If you want to engage them to some degree, you can perhaps use this as a historical example (although be warned most groups like the Mormons and JW’s don’t accept ANY council, since they consider the Church after Jesus to be a false one).
The Fathers of the Council differentiated between two Greek words from the scripture: latria (found in Matt 4:10 and Rom 1:25) which refers to worship of God alone; and timai (found in Matt 15:4, 1 Tim 5:3, and 1 Pet 2:17) which does at times refer to God, but also refers to widows, parents, and people in general. Basically, there’s a difference between worshiping something and merely showing respect to it. This is why many misunderstand the Catholic use of statues and Orthodox use of icons - they do not serve as things to worship, but instruments of worship to assist in our prayers. I kiss an icon of Christ not to worship the wood, but to venerate He whom the image on the wood represents.
Similarly, when we salute the flag, we are not worshiping a piece of cloth, but we are showing respect to what that cloth represents, namely our nation and all it stands for. I recall a story I heard from an Irish Catholic priest who came to America and served in the American military, and how he felt his throat choke up when he had to show respect to the British flag at an Anglo-American ceremony. He fully understood what the flag meant, which was a country that his home nation had not always been at good terms with. At the same time, as a priest, he could show respect to a flag while worshiping his God, because he fully understood the difference.
