I lived in Senegal for 11 years and spent 3 years in other west African countries. There isn't a lot of xenophobia in the region. I occasionally heard a bit of grumbling at the number of Guineans in Senegal but there was no targeting of them by anyone. I never heard any political party address it either.

Cote d'Ivoire is one country that has had issues with xenophobia, particularly directed at Burkinabé, and this issue contributed to a period of instability in the country.

Many people in the region hold negative views of Nigerians but afaik they have not been officially targeted except that they often get extra scrutiny from police.