The Blocksize Wars Review:

Increasing the block size limit became a divisive topic within the Bitcoin community from 2015-2017. This lead to the emergence of two opposing factions:

those who wanted to increase the block size limit (big blockers) and those who believed doing so would compromise the decentralization and security of the network (small blockers).

Small blockers were for the people 'controlling' Bitcoin and for computer science principles.

Big blockers were for businesses or large entities 'controlling' Bitcoin.