I thought this was an excellent primer on the type of fork and also in part feud that lately has been seen between the Bitcoin BTC (also known as "Bitcoin Core" or "Bitcoin SL") and the Bitcoin BCH (also known as Bitcoin Cash) chains and communities.
My interest in the topic of contentious forks has grown recently, considering that at the end of the day I find myself hopelessly trapped in between these two groups, myself both preferring and seeing Bitcoin Cash as closer to the Bitcoin design but also being very positive on the Lightning Network that would make Bitcoin SL indirectly useful for small transactions and payments again.
Start watching latest at 10m5s
Brief disclaimer: The video is a few years old and a disagreement amongst lead developers was actually part of what triggered the feud. Not all developers are hence present in the Bitcoin Core lead development team anymore and some are instead mainly working on Bitcoin Cash or other projects.