Celtophobic

Celtophobia +‎ -ic. Attested since the 19th century.

Celtophobic (comparative more Celtophobic, superlative most Celtophobic)

1. Despising Celtic peoples.
   • 1897, John Mackinnon Robertson, The Saxon and the Celt: A Study in Sociology:

     Thus we find the Duke of Argyll, who might have been supposed to be committed to the rejection of the Celtophobic view of the Irish question, whether or not he considers himself a Celt, and who in his work on Irish Nationalism makes at times a profession of disclaiming any assumption as to race tendencies, nevertheless lapsing repeatedly into expressions which set down Irish troubles to “ineradicable” vices of primeval Irish character.