"A group" here means people runs BCH nodes and mines BCH?
such changes however will require a high amount of support. so a "group" in this context can not be a couple of miners who have 1% of the total hashrate. which is also why "bitcoin" defines these hashrate support thresholds for each fork (>95%).
Thanks for the answer. But you said "these hashrate support thresholds for each fork (>95%)". BCH splitted into BSV and BCHABC, I think it's impossible to reach 95% for each fork. Right? If BCH fork only BSV or BCHABC, hashrate support thresholds should be over 95%. this I can understand. But there are 2 forks. I think hashrate of 2 new forks will be keep at a value as long as 51% attack cannot happen. Correct for me if Im wrong.