This is all incorrect or untrue.
Hammond had zero authority to arrest anyone during AvX. He wasn't a SHIELD agent. IIRC, he was hiding out, trying to keep a low profile after the horror of Remender's run on Secret Avengers. The whole "where was _fill in the blank_ during _fill in the blank_ crisis" is ridiculous in a comic discussion, and a straw man argument. And it certainly shouldn't be used in any sentence with Wakanda.
Torch and Namor first met and battled in Marvel Mystery Comics #8, so no, readers did not _literally_ meet him fighting Namor. They literally met Torch 8 or 9 issues previously, because IIRC, he also had his own comic, before that landmark battle. Readers literally meet Hammond in Marvel Comics #1, where he's created by Horton and flaming in a test tube, which had nothing to do with Namor.
Secondly, Namor was not an American hero, especially in those early Golden Age issues, so he's battling Namor as a threat to NYC, not as hero vs hero.
How is Jim Hammond as old as dirt and Toro not? Toro is OLDER than Jim Hammond. Hammond was 'born' in 1939, yes in a full grown body, but he certainly didn't "live" thru those years. Hammond also has spent most of his 'life' inactive / "dead." He went inactive after the war, and IIRC, he 'died' twice in the 50s. Was resurrected in the early 60s, to immediately 'die' again. Bryne resurrected him in the late 80s / early 90s, and he was around for a few years -- less and less with the sliding timescale -- before "dying," yet again. He was only "recently" resurrected by the Thinker in The Torch mini-series. So, with the sliding timescale, he's probably not 'lived' even ten, fifteen max, years.
Toro, OTOH, lived every minute of his many years, had a post superhero life, and was married for years. He was alive in Sub-Mariner #14 (1969 or 1970 real time) -- so he should have been 40 - 50 years old when he died. Though, of course, the sliding timeline is going to screw that up, as Subby #14 now occurs roughly 10 years ago.
Which is one reason why things probably ARE more black and white for Jim Hammond. That plus the fact that, despite his superhero name, he is NOT human. He's synthetic. If anyone is going to see things in black and white, it's going to a programmable "machine."
You mean right after Secret War, like 8 months ago in comic time? That was no where near the time of AvX.
As every single character in the MU couldn't either.
Again, just as EVERY SINGLE CHARACTER in the MU could read a newspaper, as well as every single government and enforcement agency ... and did nothing.
Hammond killing Hitler is completely different from what the SS did to Namor and Atlantis. Comparing those two acts is simply ridiculous.