Arguments based on "you weren't there" are meaningless coming from someone who wasn't there either.
I had absolutely no issue with cutting the cable, and stated so "the was 100% within his rights..." But the argument that the Op couldn't have separated the bikes with some damage is very weak. I've handled thousands of bikes loaded tightly onto trucks, buses, trains and planes which settled in transit, and have never found them tyo be come so entangled that they couldn't be separated without damage.
The OP's own words "which was not gentle...." Imply that he was not overly concerned about collateral damage to the offending bike. He had mentioned that the offending bikes pedals were trough his won spokes. I'll venture (yes, this is pure speculation) that the OP was careful and managed to rotate the pedals as needed to pull them back out of his own wheel without damage, so I strongly suspect that any care and gentleness was one sided.
I understand the OP's annoyance, but I'm less sympathetic than I might otherwise be based on his town, and apparent self-righteousness.