What welcome mat did any of these get ?Suppose you mean that the Ulster Scots , the Vikings, the Normans the Gaels all came here illegally. Our people means all of the fore mentioned, So stop that A Person concerned about immigration drivel and erase that poor me ,poor Ireland mentality and maybe you could remind yourself that there are over 5 million of up to 3rd generation Irish living in the UK and commonwealth who would like to see a change in the pathetic Irish view of outsiders. Known as the village mentality.
The Irish resisted and had the right to resist all these peoples.
2ndly - the Irish genetically and culturally come from the same family tree as these people - we are different members of the same family, we already share extremely similar genetics and culture, so any addition was only adding to what we already had in the first place- it was no dramatic change to what we were already.
This is incomparable to Africans, Arabs, SW Asians, and to a lesser extent even E.Europeans who have Mongol blood in them.
Your point is invalid.
Define what you mean by A Person concerned about immigration?