In general, the Irish are treated respectfully today although there are still many issues between the Irish and the English in the UK. . In the past there were times when the Irish were treated badly, especially in the United States and the UK.
If when you say Irish, you mean Gaelic, then no.
The Irish was the largest immigrant group in the 1800s and they were generally treated poorly. Later immigrant groups were treated the same way as the Irish immigrants of the early 1800s.
Irish immigrants sailed to Canada as early as the 17th century. The Irish chose to leave Ireland due to the Great Famine that lasted from 1845 to 1852.
As immigrants, the Irish Catholics were treated very badly. Employment ads began to contain the phrase, "Irish need not apply." This was because they were Catholics The Protestants did not like them because of centuries of religious wars.
Irish people quite likely lived in Ireland before Canada. Also some came from America to Canada.
Tom Irish was born on January 21, 1932, in Canada.
In Scottish Gaelic: Canada In Irish Gaelic: Ceanada
they immigrated to the US and Canada
1890
Canada is singular. It is a country, so it is treated as a single entity.
Irish immigrants are going to Ireland, Irish emigrants are going to many places including America, Australia, Britain and Canada.