The disapproval of the Roman Catholic Church regarding Emperor Leo's removal of icons from the church could have been caused by several reasons:
1. **Religious Beliefs**: Icons are considered sacred in the Roman Catholic Church, often used as aids for prayer and meditation. The removal of icons could have been seen as a direct attack on the religious practices and beliefs of the church.
2. **Symbolism and Tradition**: Icons hold significant symbolic value in the church, representing saints, events, and aspects of the faith. Removing them could have been interpreted as erasing important traditions and historical connections within the church.
3. **Unity and Stability**: Icons can serve as unifying elements for believers, fostering a sense of community and continuity within the church. Removing them might have disrupted this sense of unity and stability among the followers.
4. **Authority and Respect**: The act of removing icons without the approval or consultation of the church hierarchy could have been seen as a challenge to the authority and autonomy of the church in religious matters.
In conclusion, the disapproval of the Roman Catholic Church towards Emperor Leo's removal of icons likely stemmed from the deep-rooted religious, cultural, and symbolic significance attached to these icons within the church.