Freedom of expression is fine, but discriminatory measures and attacks on the person are all forms of offences that have as their motivation or effect to harm the physical or psychological integrity of others is clearly justiciable and can lead to financial penalties, so Bitcointalk could "have" a certain "responsibility" by letting this kind of behavior repeated without the slightest distancing, sanction, penalty undertaken against users who do not respect the law.
Stop arguing because you can't encourage people to support your perception in judging a piece of writing that is labeled freedom of expression. You can do this yourself if needed. Check out this option.
- You know what the "report to moderator" button does, right? Report the post to a moderator for follow up and include a little bit of information about it.
- You know what a "trust system" does, right? Open your trust setting and enter the person as someone you don't trust with an "~".
Both action are easy enough for you to do, I guess you just need to stop arguing that will only end in vain. The logic is that you shouldn't always resort to feeling when someone doesn't like something they don't like. He is free to give judgment, freedom of expression, free speech and you just have to take the middle ground and you are free to ignore it.
Now what would you say, would you also say I racist you just because I don't support your perception ?