The global warming/ climate change/ climate emergency crowd have a basic flaw in that they use modelling based on their preconceived idea of how the climate works (an assumption that CO2 is effectively the control knob). These models then produce "forecasts" of the future that basically boil down to: change in temp = change in CO2 x ECS. Where ECS is the "estimated climate sensitivity" to a doubling of CO2. If you point out flaws in their work they will call you names, like "denier". This indicates quite strongly that theirs is a "belief", a "faith" even.
There are some astoundingly huge things that they miss though. Their models (hugely simplified here) are little more than linear (or exponential sometimes) projections which also assume that the feedbacks are linear.
The climate is a CYCLICAL chaotic system, actual feedbacks are very much non-linear and in some cases may change not only manuring but direction. Water (in the atmosphere) for example is a positive feedback at lower temperatures as water in the atmosphere absorbs light and emits infrared light (just as CO2 does). However, once the sea surface temperature gets close to 30deg Celsius that feedback turns strongly negative due to the formation of tropical thunderstorm clusters. These thunderstorms act like giant automatic refrigeration units. Warm humid air rises from the sea displacing the cold dry air above it and forcing it down. Once the water vapour reaches the upper troposphere it condenses (releasing lots of heat through latent heat out condensation) forming tall thimble clouds which, by the time they form in the late afternoon, shade vast areas as the sun is more at a lower angle.
How do climate modellers model phenomena like this? They don't. They "parameterise" their models.
Water is an amazing substance.
There is lots more too. Generally, climate models assume that the Sun is static. I.e. there is no change in its output that effects the climate. However, the Sun does change both in terms of radiative output (very small changes) but more importantly in solar wind and magnetic field. The magnetic field can have significant impact on terrestrial weather patterns through influencing the jet streams.
Climate is very complicated.
As far as glaciers melting. That is what happens in an inter-glacial period. That particular one would be one of the last tropical glaciers remaining. It appears to have banished due to lack of snowfall (a glacier is just a frozen river, without snowfall they will vanish, typically due to ablation more than melting). As for Glacier National Park. They used to have signage saying that the glaciers would be gone by 2020.... they quietly removed them in 2019 as the glaciers there are actually growing.
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