Heterophobia is a neologism coined in the 1980s, first appearing in print in 1990, used in analogy to homophobia. It does not have much currency outside the field of sexology, and limited use even within that field.
... Hank Snow
1980 Paul Anka
1981 Joni Mitchell
1982 Neil Young
1983 Glenn Gould
1986 Gordon Lightfoot
1987 The Guess Who[?]
1989 The Band
1990 Maureen ...