VDARE.com contributor Linda Thom writes that letters to the editor like the one she wrote below disagreeing politely and factually with a Wall Street Journal immigration enthusiast editorial, do get published if they're well reasoned and well argued, because "Editors look for differing opinions."
https://vdare.com/posts/linda-thom-in-the-wsj-the-u-s-doesn-t-need-any-more-immigrants