Ignore Assange's character, make him an anonymous person instead and think "is the process X person has gone through for Y actions reasonable/legal/supportable?"
Should whistleblowers be supported or vilified?
I don't like the guy, but I also don't like arguments based on political narratives.
Is the evidence Assange released factual?
Assange has certainly played with outright lies e.g. Seth Rich.
Most of WikiLeaks output as far as I'm aware is mostly truthful to what was given to them, with the caveat that they are telling a story (e.g. bellingcat have no issues finding dirt on Russians, WikiLeaks don't).
They are also very happy to cause collateral damage of their own, IIRC they're very happy to leak personal details & CC numbers of people associated with those they dislike (iirc it was democratic donors in some US state, the data was leaked unredacted).
I mean, if Wikileaks did (I wish they did, political bias ruins everything) release both troves, would your thoughts on the current situation change?
Nothing - but that moral judgment has a lot to do with some people deciding the cause is not worth supporting after realizing what the cause truly is about.