Similar people, similar politics of hate however you want to dress it up.
They are not anti-Irish; they are Unionist. If you don't know what that means, consider educating yourself. You should also consider not viewing everything through the lens of US history and American race relations. The specifics matter.
I've no interest in learning why these people think it's OK to express their deeply offensive views on the streets of a Scottish city, or indeed any other street or city.
The people who march in Orange parades may be from Northern Ireland but they do not consider themselves Irish in any way and would be deeply offended if they were described as such. British. Ulster Scots. Northern Irish at a stretch. But never Irish.