Oh yes it is.

To me this one is not so much about Ernest's 'wacky' hijinx as what happens around them.

I didn't see the first one, but I'm unsure of what the racism is here. I see the parodying of an ignorant, racist character (Ernest). The scene, as it is, seems to be highlighting why the audience is to laugh at and not take seriously how Ernest reasons/thinks about the world and other non-whites.

Well this one is a little more subtle and possibly subjective, but let me lay it out for you barebones and maybe it'll pop out like a Magic Eye picture:

1) Ernest comes upon a random village and makes an awkward attempt to greet three African dudes.

2) The Africans immediately decide to dismember him.

3) Ernest, not knowing what's being discussed, spouts some 'hilarious' ignorant gibberish in an effort to communicate.

4) Against all odds this gibberish forms a complete, if confusing, sentence in Zulu.

5) In response to this nonsense statement, the Africans strike Ernest unconscious.

I don't know, it all seems a little iffy to me.

I made beats in fruityloops and some black rap guys in the library dug it so I think I can speak as an authority on race.