I have to admit that I had not heard Trump say that but after a Google search I found that you are correct; Trump did say that. Why he said it I have no idea. I should add that these days I have been conditioned to accept that politicians from both sides of the aisle are constant liars no matter how they are described.
My thoughts though are that claiming a father is from somewhere is really no big deal to me. WHat is important to me though is the time and money devoted to the so called Russiagate matter that we now see was just one big assortment of lies directed against a sitting President of the United States by a political party and its linked media seeking to further their agenda and candidates.
I am very disappointed that today that many of us, including myself, now have to judge political actions on which party told the least amount of lies but unfortunately that is the deck we have been dealt it seems and in this particular case I can overlook a false birth location for a father but will find it much more difficult to overlook the Russiagate mess that happened at the same time and continues to this day.