There is only one Truth. If the State wished to execute me because I follow that Truth, then I would ask God to remove that cup from my lips, and if not that then to give me the courage to die well.
However, that’s not really what you’re suggesting. What you are suggesting is that my beliefs are no more inherently true than any other beliefs. So of course, to you, it seems equivalent. But that is not how it is. So when I say the State should punish those who promote blasphemies and heresies, I am not suggesting they are allowed to punish anyone they want, but only those who are actually promoting blasphemy and heresy. If someone disagrees with the Church concerning what constitutes blasphemy and heresy, they are wrong and the Church is right.
Spanking a child because he did something wrong is not equivalent to spanking a child because he did something right.