I don't think I've ever heard an Orthodox homily directly attacking another group of Christians.
I've heard homilies attacking things associated with other Christian groups that Orthodox Christians can easily fall into, and that as an incidental that theology is wrong,
but never a direct attack.
However when I was in the process of converting to Orthodoxy I hated Protestantism, though I dropped Protestantism years before I started exploring Orthodoxy, I felt a deep hatred toward them. About two months before my Christmation I was put in a situation where I was forced to spend nearly a month, 24/7 with a rather diverse group of Protestants. While I certainly wasn't interested in rejoining them after that time, I did come to recognize the element of the truth which they held, and that the Holy Spirit has not completely abandoned them. At any rate the trip helped me get over my feelings toward them, and to this day I give thanks to God for putting me in that position.
I think Christ's command that we love one another is one of his most difficult, in part because we often forget about it. Just because you disagree with someone doesn't mean you can't love them. In fact you don't even have to like someone to love them.