I assure it is not "bitter" zeal, but an earnest zeal for Christ.
Paul called the Galatians foolish at on point. A lot of people have a hard time with that.
Often times that kind of passion for the Truth is misunderstood.
I wish you well.
Bitter zeal most definitely involves a passion for truth.
And misunderstandings, including self-misunderstandings, take many forms.
I do thank you for your well wishing.