Earlier quoted context omitted.
"Screeching" in english (at least North American english) is typically a gendered derogative. You generally wouldn't say a man was "screeching", not unless you also wanted to imply he was effeminate. By avoiding the word, you avoid insinuating the target's gender is part of the issue, and/or avoid insinuating that the target is effeminate when they "should not" be, i.e. you avoid homophobia.
Either I am completely out of touch, or this comment is nonsense. A screech is a high pitched sound, nothing more unless otherwise indicated.
Screeching (loud piercing sounds) is what eagles some other large birds do. It's also applied to tires which lose their grip on the road during a burnout or the like.
Looks like the character “Screech” will have to adopt a new (nick)-name.