Careful there heretic lest you get a taste of the Spanish Inquisition!
For the vast majority of people who begin mindfulness practice it becomes a technique to calm the inner comparative voice and reduce the stress and suffering caused by an undisciplined mind. This is like working out at a gym or running or doing yoga and should not interfere with or contradict anyone’s core religious teachings or practices like prayer. Many Christians, Jews, Hindus, and Muslims use contemplative practices in their daily devotions that are very similar to mindfulness meditation.
It is true that the final goal of meditation practice is liberation from the conditioned mind and a complete understanding of impermanence, suffering, and the illusion of the ego but this level requires a lifelong of deep meditation that is very difficult for ordinary working people to maintain.
Nobody expects the Spanish Inquisition!