I'm unclear as to what "tarrier" actually means? Not something I've ever heard outside the thick, bigoted, insular world of the moronic west coast Personally not offended by either but think that people that use them routinely look a wee bit stupid.
I couldn't give a **** if anyone called me a taig or a tarrier (I'm neither any way) nor do I find them to be sectarian but we live in PC times.
I consider them both sectarian, hence I use the words on a daily basis. What is the point of calling those fenian bastards "taigs" or "tarriers" if it isn't sectarian? I really can't see the logic in it.
Nonjudgmental here in Dublin and if I heard either word shouted at someone I would assume that person had a speech impediment and look the other way.