What is the general opinion among the Orthodox you know when the topic is ecumenical dialogue with Protestants or Catholics?
#1 It is analogous to theological assimilation and compromise.
#2 It provides an opportunity to fully appreciate Orthodox sacred Tradition.
There needs to be another option as the first option is the reactionary response expected by modernists, ecumenists, and those skilled in dialectic materialism, so this reactionary position is presented as a straw man, which they can and do attack.
The second option is the alleged position that modernists, ecumenists, and those skilled in dialectic materialism present to disguise their true position. If ecumenists can draw educated and respected members of the clergy into their circle of friendship, then they can achieve compromise as a way of unifying all Christians by finding common elements that connect us as Christians. These common elements are the bare bones of Christianity minus our own sacred Traditions. Is outrage!
I did attend ecumenical events when I was at the university between 2003 to 2008 with the recommendation of my confessor in the OCA. These ecumenical events included meetings with Muslims, Jews, Hindus, and Buddhists. Even among Christians due to feminism, the only common prayers that could be expressed excluded any reference to the Trinity, Father, Son, Holy Spirit, and Christ Jesus. I stopped going and realized how sinful these events were when there was an event hosted by the Muslim and Jewish student associations. The Jewish students pulled out of the event at the last minute but provided some food while the Muslim students took advantage of the situation by inviting imans who separated us one on one and tried to convert us to Islam. How many Christians lost their faith that day, I have no idea, but that was the tipping point for me as I made a hasty retreat from that event and from the ecumenical movement.