You can't steal with a double spend. At worst you can send a transaction and then later undo it. But that would require the dishonest party to work together with or be the hostile miner.

I'm pretty sure the backlash against both the hostile miner and all of Bitcoin combined would not be worth it, except in a Joker 'Let's burn all this cash' kind of way.

The worst a majority can do, is to create a new longest chain without any transactions. But in that case the transactions would still exist and can be mined again later (and supplanted again later).

But that would require a miner to want to spend resources to hurt the minority fork.

If the minority fork is big enough to be a threat, that would require a lot of 'majority' miners to work together to pull off this attack, which would lead to a tragedy of the commons situation. Any majority miner who doesn't participate in the attack would gain.

If the minority fork is small enough to be a toy for a single miner, it still doesn't make sense to put in the still substantial effort.

Just look at the Ethereum fork. Afaik there have been no shenanigans pulled of by a majority miner on the minority fork, even though it's only about 10% of the size.