Very many scientists do not believe in MMGW. In fact if you take out those scientists who are on the MMGW gravy train then there are almost certainly more "deniers" than "warmists".
Here is one reference:
Global Warming Petition Project
And here is another:
As has been pointed out earlier there was the Medieval warming period, 1.5C warmer than the current one. The coast of Greenland was farmed successfully by the Vikings, you can still see the remains of their farms. And there was no fossil fuel use then.
The Roman warming period was as much as 4C warmer than the current one. They grew exotic Mediterranean fruits at Hadrian's Wall. And this was well before Ryaniar existed.
Two bits of science to add clarity. Firstly there are an infinite number of ways of measuring the earths temperature, even producing trend graphs going in opposite directions. "Scientists" tend to select the graph that fits their theory. Secondly climate change is experienced more the closer you get to the poles, with far less effect near the equator.
There is no scientific proof that CO2 has a greenhouse effect on our planet. Many scientists say that it doesn't. Here's one:
https://principia-scientific.org/che...global-warming
In fact you could say that the use of fossil fuels is only returning to the atmosphere carbon that used to be there but which has been trapped underground. That we actually currently have a historic shortage of CO2.
The only provable scientific effect of burning fossil fuels that every scientist agrees on is that has massively greened the planet. Providing food for our burgeoning population. Preventing famine. Because CO2 is plant food. So those turbines on Ryanair's fleet are feeding children in Africa. This fact would confuse Greta.
Unfortunately the MMGW debate has nothing to do with science. It is pure politics with the UN using it as an excuse for globalisation. So those who believe in globalisation, such as the BBC, force the MMGW mantra down our throat at every opportunity, having sacked their scientists, such as David Bellamy, who did not agree with it.
Finally take a look at Milankovitch Cycles. The earth does not follow the same orbit round the sun every year because it is puled slightly off course by the gravitational pull of the planets. In the 1920s Milankovitch showed that this created cycles that had an effect on the climate. Scientists have now calculated Milankovitch Cycles going back hundreds of thousands of years and they are a perfect fit for the climate records.
And yes we do have climate records going back that far from looking at isotopes in glacial layers and in lake bed deposits.