The only thing you are proving is that you are an idiot.
There are a number of ways to prevent ice from melting. In the days before refrigerators, ice was packed in sawdust to keep it from melting in summer as it was shipped across the country. Deep snow can also take a long time to melt even in very warm temperatures. You claim to be from Minnesota but I doubt it or you would have seen large piles of snow piled up that were pushed off 3 story parking ramps lasting into late June and even July. If you were from Minnesota you would also have seen snow melt when the temperatures were below freezing. Do you know what an ice dam is? (Hint, it's like what is likely happening on Mt St Helens to create a new glacier.)
The top of Mt St Helens is not at sea level. Prior to it's eruption, Mt St Helens at its peak because of its elevation had a
perennial snow cover.
Global climate change doesn't change the height of mountains.
Multiple pictures of Mt St Helens in the summer with snow on it.
https://www.seattlepi.com/seattlenews/slideshow/Mount-St-Helens-then-and-now-62684.php
The eruption changed the shape of the top of the mountain, creating a crater. The crater means that show accumulates differently than it did before. Snow needs to become ice for it to create a glacier. How does snow become ice? Direct sunlight can melt snow even if the air temperature is below freezing. The change in the shape of the mountain and the crater with shadows means the snow above the crater is melted and then it flows into the crater where it refreezes as
.... wait for it...
....
ICE!!!
Like I said. The only thing you are proving is you are an idiot that has never been to the mountains and aren't from Minnesota as you claimed.