You mean I hate Greta. People who hate the young Swedish activist Greta Thunberg (her full name is Greta Tintin Eleonora Ernman Thunberg).
Gretaphobia sees in the Swedish teenager, at best, a useful idiot, someone who doesn't know what he's saying, a Soros or Rockefeller instrument, when not a "zombie." Some synonyms, words, or similar expressions may be anonymist fighter