Complex sentence: Their arrival in England, and the inability of the British Government to integrate them, caused a highly politicized debate over the merits of immigration, and led to several unsuccessful attempts to settle them in England, Ireland, and the Colonies.
Split into simpler sentences: Their arrival in England, and the inability of the British Government to integrate them, caused a highly politicized debate over the merits of immigration. The English tried to settle them in England, Ireland, and the Colonies.