Really? I thought that rap is on the top now! When I turn on TV there're tons of rap music. R'n'B and Rap are popular everythere now.
As for defending...that' meaningless, because different people have different tastes. But all that I now for sure is that if you don't like music, you better don't listen to it,but don't offend others, who like it. Just be silent then ^^
Personally I'm also not so keen on rap, but I like Linkin Park's songs where rock & rap are mixed - that's cool ^^