If you don't plan on anyone else ever reading your book, then concerns about reactions are moot.

If when you finish you do want to let someone read it, then use the First Reader technique, where only that person you choose gets to read it. I would recommend your FR to be someone neutral to any situations; they can tell you if anything written could hurt someone else. Then rewrite said offending section before anyone else reads it.

This bypasses the internal critic until that first draft is done.