That's an incredibly inflammatory, ill-informed statement to make. No railroad, be it CSX, BNSF, UP, NS, or anyone else, is going to intentionally add to (or ignore) the risk of a freight train incident occurring from heat-related track buckling while at the same time restricting passenger operations in an effort to prevent track-buckling derailments of passenger trains.Actually the real problem is that CSX's rules are far more restrictive to passenger service than to freight service. Apparently in their world it's OK to put a freight train on the ground at speed, potentially unleashing hazardous chemicals that could kill hundreds if not thousands, but putting a passenger train on the ground isn't OK.
Deliberately endangering employees and the public with freight train operations is not sound management practice for a railroad or any other transportation organization, and the RRs aren't going to make a plan that does so. In addition, the FRA would have something to say about it, and fast.