When it comes to language, there is a lot of room for interpretation. What one person may deem as being polite could be seen as being offensive by another. This is why it's important to be aware of the different connotations that words can have, and to use them in a way that won't cause offense.
One way to do this is to avoid using words with negative connotations when discussing sensitive topics. For example, instead of saying illegal immigrant, you could say undocumented worker. This small change can make a big difference in how your words are received.
Another way to avoid linguistic terrorism is to simply be aware of the power of words. Realize that what you say can have a real impact on people, and think before you speak. If you're not sure whether or not something might be offensive, err on the side of caution and don't say it. It's better to be safe than sorry.
By following these tips, you can help ensure that your words won't be misinterpreted and cause offense. Just remember that communication is key - if you're ever unsure about something, just ask!