Posting racist stuff just means you're stupid and the company made a mistake in hiring you.
Also, you don't have to have good morals or even be intelligent to be good at your job. Some people are fantastic at their job, but are pretty damn "stupid" as you put it.
I guess I reject the idea that policy (a well considered and debated, long lasting decision) would actually fall for something like a slippery slope.
The proverbial boiled frog just jumps out of the pot when the water gets too hot, in reality.
Interesting that you feel that way. It's certainly not something I'm worried about.