Communication is not a magic wand. 
We're dealing with humans and that's why understanding a few things rather than assuming is important.
Why do people get offended?

Intentions, clarity of those intentions, and creating a context are important things you need to keep in mind before jumping to conclusions about problems of communication. 

Do you also face situations where your intent is right, but the person you're expressing it to, takes it in a completely different way? 

Check out my podcast where I tackle the conflicts of communication and being offended.