Compare and Contrast the impact of islam in west and east africa?

Islam has been in East Africa since the lifetime of Prophet Mohamed (pbuh), while Islam's arrival to West Africa is relatively recent. As for the impact, I'm East African so I only know of the specific impacts the religion has had on my culture (Islam). Islam has become ingrained into Somali culture. Poetry and Islam are considered to be the two pillars of Somali culture. Somali poetry is often about love, pride in our nation and people, nature, or Islam. During the time of each five prayers of the day, there are bells or gongs or similar instruments that will sound to signal the start of the prayer period. Pork is not served in any restaurant in Somalia and the people abhor alcohol. "As-salam alaikum" is one of the customary greetings in the country (which is a Muslim greeting which means "peace be upon you"). I'm sure that Muslim East African countries like Eritrea, have similar customs.

Ethiopia is not a Muslim nation and so the effects Islam had on it is not much in comparison to the effects Islam had on other countries. It is sometimes considered to be a Christian nation, although it has a large number of Muslims and Jews. Ethiopia is very diverse and has many ethnic groups. The ethnic Oromos and Afar are mainly Muslim. There is a city in Ethiopia called Harar and although many East African ethnic groups have disputed over it and the different groups have, at some points in history, dominated there, the Afar I believe, made it into a well-known East African city that was at some point flourishing and was one of the cities in East Africa that were considered to be very religious (Islamic) and today has at least 110 mosques there. Today, it is more diverse.

Eritrea has many Christians and a few Jews living there but it is mainly Muslim, so I believe Islam has had more of an influence there.

Tanzania, Sudan, Kenya, and many other East African countries are only partially Muslim. However, Somalia has the highest percent of Muslims (99%) and so Islam had the greatest affect on Somali culture. Only 70% of Sudanese are Muslims, many of which are Arab settlers.

I'm sorry that I can't provide sources for you that explain the impact Islam had on the rest of East Africa and West Africa. It's not well-researched and most books or sites that provide this information are not entirely correct and are sometimes biased as Western societies seem to have a distaste for Islam due to ignorance on the religion.

First off, my I suggest that you lose the 'dominant' religion jargon? It's an over-simplification and it's also wrong for much of the world's population. Judaism is in constant dialogue with ALL of its tradition. You'll know the Christianized version of our original texts, with all of its wee edits that create 'prophecies' for Jesus to fulfill. We also have layers of commentaries on those original texts, and commentaries on the commentaries, and so on. Jewish tradition is careful about how it amends itself. Take animal sacrifice. Besides being the broader cultural practice of the time, it made a lot of sense for nomadic shepherds. It didn't work so well during the Babylonian exile, when the 1st Temple was destroyed and the people were spread out. They had to come up with an alternative, which was prayer, to fulfill those commandments. To an outsider, it might make more sense to just remove the verses commanding Temple sacrifice. To Jews, that would be dishonoring Torah. Instead, we understand that the prayer services completely fulfill the commandments.