You’re probably going to think I’m very presumptuous but I’m going to say this anyway in case it is helpful for you.

If people are frequently offended when you speak on a topic you’re probably being offensive somehow through content or delivery.

In my experience the thought “[they] feel threatened anytime something is expressed that differs from […]” is not accurate and it also turns off your brain on trying to figure out what is actually going on. I can recommend from personal experience a small apology and transition to more listening in that moment. If more feels appropriate, giving it some time and space and re-engaging gently to discover what went on for them in that moment can yield a lot of value for both sides.