That's partly true but not the whole story. The CIA has it in for him -- they developed plans during the Trump administration (Mike Pompeo -- the authoritarian shitheel) to kidnap or assassinate Assange while he was in the Ecuadorean embassy. Not only the early wikileaks release of the collateral murder and other documents showing the war crimes of the US empire, but they also published the Vault 7 CIA document leak which was the largest leak in CIA history. They want blood and it looks like they'll get it.