Heighten that six times over to the early 1850s.

在五十年代初时掀起了六次移民大高潮
The huge irish migrations to the United States

大量的爱尔兰人移民到美国
had just happened between the mid-1840s, especially the late-1840s,

这一事件恰逢四十年代中晚期
And about 1852 to '54.

还有1852年到1854年间
This is the moment, the historical moment,

这在历史上是个重要的时刻
Of the terrible, infamous potato famine in ireland.

当时爱尔兰严重的饥荒土豆匮乏
The nativist party was anti-catholic, anti-immigrant.

本地党反对接纳天主教徒反对移民
They believed that catholicism would undermine

他们认为天主教的教义有损
American protestant values and the protestant work ethic.

美国新教的价值观和道德观
They believed that a United States of America ought to be

他们认为美利坚合众国应该属于
a white, anglo-saxon,

一个白人盎格鲁撒克逊人
protestant nation, as it was in its founding.

信奉新教的国度它刚刚起步