> America was very much against immigrants between about 1925 and 1965.
And still despite immigration reforms and national origin quotas, USA still accepted by far more immigrants during this time period than any other country.
Per capita far from (Australia and Canada, Israel, France, Taiwan, Switzerland , Belgium, Argentina...) on an absolute number sure because they were the most populous industrialized country. Even the latter you could argue against as west Germany had many after WW2 move from all over 'back to' Germany.