Memes

Redsails is also not a good source, it’s openly from an ML perspective, so it’s not neutral, which you absolutely have to be when discussing history. It’s also under no pretence to be academic or accurate either, Redsails is ideologically driven rather than factually driven - so it won’t ever be critical of the ML perspective. You can use redsails to talk theory, absolutely, but not as a historical or factual source, it’s dishonest.

There is no such thing as a neutral historian. Every human has things they know and things they don't even on topics they are experts in, every human has opinions on the things they know (or think they know) that will unavoidably taint what they say, even unconsciously, and therefore, everything written or said by a human is necessarily biased. And that's saying nothing of financial interests, politics and other things that bias things even further.

This is not avoidable, the most you can do is be aware of biases and work with/around them.

If an historian or a journalist tell you that their work is "neutral" or "unbiased", they are either lying to you or don't know how biases work, and in either case you should be very skeptical of them because they are clearly not doing their job correctly.