Whoever hates is once again a participial construction in Greek (literally “the one hating”), which is the equivalent of an indefinite relative clause (see 12.44). This verse is similar to 5.23.
Quoted with permission from Newman, Barclay M. and Nida, Eugene A. A Handbook on the Gospel of John. (UBS Handbook Series). New York: UBS, 1980. For this and other handbooks for translators see here .