It would destroy confidence in Bitcoin and that is enough. If you are talking about a hard fork say so. No need to beat around the bush.
Destroy what? The total Hashing Power of Bitcoin assures that it’s the network/protocol safest to HODL value.
The rising transaction fees are a problem. It is an effective limit on growth in the long term. Small transactions are already impractical. People will turn to Bitcoin Cash eventually[/hope]. A 51% attack on Bitcoin isn't really necessary. Bitcoin will become weighted down by it's own increasing transaction fees. Fine for buying a Tesla, but anything less than $200 is just plain stupid. Might as well use your Mastercard. It will save you money.
I HOPE Bitcoin Cash WILL have more than Bitcoin’s daily transactions to teach, and prove in practice, how flawed the design decisions were made on a decentralized network.
Bitcoin is over rated.
Your opinon, but it chugs along and will live longer than Bitcoin Cash, simply because of the choices made by the developers.