I watched the first 13 seasons of South Park as they aired and the post you're replying to feels like at least a sincere and reasonable interpretation of SP's politics.

What season is the Mr. Garrison storyline from?

Why is it insufficient to (assuming the poster isn't lying to us) watch SP for 20 years before drawing a conclusion about it and the creators? They owned up to not having watched recently before asking about whether things have changed. I don't understand the weird hostility in your post when they owned up to the limitations of their PoV.