Did you meet hundreds and thousands of them? I doubt it, a couple of hundred maybe.
Exactly where in your previous post did you mention numbers?
We emigrated to English speaking new world countries, like America, Canada, and Australia as did every european nation... We owe the Poles nothing.
So, when you do what everyone else does, it's OK but when everyone does it to you it's different? You weren't part of US and plenty of Irish still go there and have been throughout the 20th century. What difference does it make if you speak the language. Plenty of Irish emigres during 19th Century didn't speak English either.
We also emigrated to the UK, which we where part of at the time.
What, during the 1950's? I may just be a stupid tan but I seem to remember that the 26 counties left UK in the 1920's.
Just a footnote, I have absolutely no problem with Irish emigration/immigration (other than some of the reasons many of them had to do it prior to the Republic). I'm trying to show you how flawed your own remarks are.