Revealing information about many murders is very different from doing murder.
Arguing that he hasn't personally killed anyone is not a strong rebuke against such allegations.
The risk inherent to collaborationism is also not one anyone but the informant must account for. Just as mercenaries operate in that same high-risk-reward / low-solidarity space, and accordingly join the cast of characters in war zones along with spies and informants without international sympathy.
The upcoming 2024 elections in the US find both parties trying to court subsets of the population who mistrust the government, so surely freeing Assange was done for realpolitik reasons.
It is not too late for Mike Pompeo to end up serving time. Let's hope that he is brought to justice ASAP.