There is no reasonable difference between what "farmers" say and what Facebook says, or the Collection of sad landlords, or the conglomerate of weapons manufacturers for world peace. It's all the same lies to keep the cash cow going as long as possible to extract as much value from our planet before everything goes to shit.
If people did do research, they'd find out that the main, humonguous problem is animal agriculture. Whether it's water (https://www.vox.com/the-highlight/23655640/colorado-river-wa...), land, energy or CO2e production, it's not anywhere close to sustainable to eat meat every meal, not even every day.
Conflating dirt farmers in Africa and industrial farms in developed countries is totally wrong. No, I don't think industrial farms should be able to overuse water resources that belong to everyone.
Clearly these would-be educators are doing a terrible job if one must “do research” before “casting blame.”
Humans are bad at predicting the future going by the record
Some countries have tried to stave off population decline with indiscriminate mass immigration, but that turns out not to be a long term solution.
The Kaya identity is relevant: impact = population × affluence × technology.
If population falls slowly, then it's likely that growth of affluence will more than compensate.
In addition, resource usage grows when peoples lifes improves. So we don't need to have more people, we can just give more people basic rights and have economies like India grow. Their consumption of luxuries like meat is constantly rising, because more people can afford it.
An extreme example (from memory) is Ghana. One american uses as much CO2e as 200-ish Ghanans. Imagine a miracle happens, and we stop with the neocolonialism. Suddenly, Ghanans can afford the basics, and they use twice as much CO2e pP.