It was an honest answer to the question, but I'll answer in a different way: yes, in the world you imagined, anti-black slurs would be fine because they wouldn't exist. It's telling that you had to basically turn the entire world of racial politics entirely upside-down to get to that conclusion.
In contrast - and this is a very simple concept - the term "cracker" doesn't hurt me in the slightest, and I'm the pastiest white person you ever did see. The fact it hurts you so badly shows you that the anti-white sentiment that exists in the discrimination you face specifically hurts you because you are not actually white.
You're here banging on about anti-white racism and you want to pretend you're on the left? Read a book.