The "gospels were dictated by first hand witness" idea is a massive problem because that's not first hand account at all, that's actually someone claiming that someone else told him "dude I swear I saw it happen in front of me as clear as I see you" (or worse, the guy who wrote it claims that he found this text written by someone else 50 years ago) and we somehow chose to believe both the guy who wrote it and the supposed guy who told him that. Having something dictated is second hand account, not first hand, because that's just changing the pronoun of the person speaking. And there were extensive analysis of the text itself to try to figure out what kind of person would have phrased this or that in certain ways, whether it says "I saw that myself" or "my uncle who works at Nintendo told me he saw it himself", and that analysis, done for the entirety of the Bible, has gone pretty far, including the gospels. As far as I know about it, the biggest point about that analysis is which gospel was written first and which ones copied from which ones or added their own thing, rahter than 4 different people recounting their memories of the same events.
I don't know about the timeline of the temple; I've heard it brought up before, but I haven't heard that it was considered conclusive evidence for dating the text, so I don't know more than that and how it holds to the text analysis.
Minorities get passed over and screwed over for basic needs like housing, education, childcare, etc. As a result, when someone says "we only hire competent people, the best people for the job, it's not our fault if these minorities we interviewed happen to be incompetent" that's already setting things up to reduce their presence in society, which loops into making them poorer, with less access to basic needs and so on. Refusing to hire a woman for one job and hiring a man instead because you think she's less competent is tunnel vision, you're focusing on a single job and trying to scale that to the whole of society; the most direct answer is just to hire more people and train everyone. It's corporate thinking to assume you will only hire a single perfect worker for all of your jobs, but all you're doing is only reducing your work force, which only ever works for the corporate bottom line until you run out of people to fire. And when the imbalance is so bad, there is a point where, on a large sale, you need to hire a higher number of women / Black people / handicapped people to catch up, because you've shut them down the whole time; and that basically makes it your own fault if you think they're less competent than educated competent men, because they didn't get the opportunity, because they didn't get the training, because... they didn't get the opportunity.
The "hire only competent people = only white men" is a self-fulfilling prophecy because it creates the entire situation of everyone else being less competent, being lower on the decision totem pole (like the decision to help minorities get out of that loop), having lower incomes. If you help only your own because they have the skills you want, you are creating the situation where you perceive everyone else to be lower by your own standards. Someone's gotta make the first step to bring everyone up to the same level, and you know it's not going to start in education and housing. Because those people are not up there making the decision to help with that. The people who can make the decision choose not to help, because those minorities don't have the same skills as this other guy here.