Complex sentence: These taxes brought about a permanent demographic change within the minority population, many people of the minorities, especially the Greek minority, felt that there was no future for them in Turkey and they left their ancestral homes and became refugees in Greece.
Split into simpler sentences: These taxes brought about a permanent demographic change within the minority population. Many people of the minorities, especially the Greek minority, felt that there was no future for them in Turkey and they left their ancestral homes and became refugees in Greece.