Has anyone actually read what SOC wrote, or is it only this short, filmed interview? In which she genuinely appears to be rather more sympathetic towards him than not, asking him questions about his eccentricity and saying it's not a crime, unless you're a 'square' person -- she also makes some deeply dopey remarks about how IB had done something risky in coming to a 'theocratic', pre-Good Friday Agreement Ireland... 
www.independent.ie/news/there-was-xenophobia-towards-my-englishness-ian-bailey-tells-sinead-oconnor-why-he-was-the-ideal-suspect-for-sophietoscan-du-plantier-murder-40662944.html
Honestly, so many of the people writing and making documentaries and podcasts about this case have zero idea of what west Cork is like it's had a fairly entrenched alternative living scene since the 70s, with lots of crusties/new age travellers/alternative communities from overseas living in the vicinity as well as, in places like Schull, significant numbers of second homes owned by people, Irish and foreign, with huge money and boats. This isn't the Valley of the Squinting Windows by any means, and it wasn't in the 90s, either.
To but it bluntly, IB wouldn't have stood out as remotely unusual, unless his own crass behaviour made him so. English drifters with a mildly artistic/unconventional bent, some of them not particularly nice or well-integrated people with criminal records for drugs, are ten a penny in west Cork.
I can easily believe he encountered some xenophobia, but it's likely to have been exacerbated by his drunken attention-seeking, violence to his partner etc, long before the murder. No one likes the guy who can't hold his drink and is continually banging a stick on the floor of a pub to command attention for his dire poetry, proclaimed while banging a bodhrán, when other people just want to get in with their evening out.
He may well be completely unaware of the extent to which he has contributed to his own ostracism -- I keep seeing interviews where he says he was 'saddened' by being asked to leave a restaurant, but the only time I was in a pub (Levis's Corner House in Ballydehob) he was asked to leave, it was because he was aggressively drunk and loudly heckling the band. And the owners gave him several warnings before he was chucked out.