Complex sentence: He further claimed that the anti-racialist ideology did not reflect the real world as it ignored the power of nationalism in the cases of Ireland, Israel and African decolonisation and that the countries of Europe became more nationalist with more democratisation.
Split into simpler sentences: He further claimed that the anti-racialist ideology did not reflect the real world as it ignored the power of nationalism. Casey gave the cases of Ireland, Israel and African decolonisation as contemporary examples of nationalism and argued that the countries of Europe became more nationalist with more democratisation.