Well that's the thing, it goes back to what I was saying. The extent of that pressure comes at least in some part from the fact that culturally speaking what African emigrees are coming from isn't really all that concrete otherwise there wouldn't be so much shame associated with it.
I'll explain the assimilation thing further in regards to Africans and African-Americans.
African-Americans...they came here as slaves, had their culture completely destroyed and replaced, were separated from their familes, sold to other slave owners, given anglicized names, denied educational opportunities, and everything else.
Fast forward to the present. Africans that come to America (besides everything you have mentioned) have families, family structure, heritage, culture, and everything else. So, since that can't be removed from us forcefully like it was removed for African-Americans, it is up to us to destroy our own culture in order to "assimilate" in American society and be "accepted". (This is what I was trying to elaborate on).
When we wear our traditional dresses and garb to work or other functions, we're told that it's "too ethnic" or that it's "loud and distracting". They don't have the gall to say it makes them uncomfortable.
We're constantly being told by so many people how to act, who to associate with, how to think, who to date, where to work, what to listen to, etc...it's really easy to see the difference between black, white, and American, when you're not American. Therefore, you'll have native born Americans (I'm talking generations deep) telling you how to conduct yourself and remove your own autonomy simply because they feel as if they are your "tour guide" to American culture.
Even Black Americans tell us we aren't Black...when we are Black. Simply because we don't fit their definition of "black" to them. As if Black American identity revolves around sports, entertainment, and the hood.
Most Africans don't date or really associate with Black Americans just due to cultural differences (and a slight disapproval of African American culture/inability to relate to it).
Africans are pretty much told by and large in regards to their families to marry African.