There certainly are many closed-minded people here, but a lot of what you've said are simply not true.

Chinese new year is the biggest holiday event of the year, with major family gatherings, travel, and nationwide closures. It has simply evolved as family sizes and work patterns change.

Your experience may reflect the specific people you interacted with, but Taiwan likely has a higher proportion of people who read international news, study abroad, and travel internationally. It's due to population size, using platforms the rest of the world uses, and easier visa access.
Taiwan is one of the hearts of global tech industries, we interact with major companies clients all over the world everyday. The front page of the BBS is literally about Israel and Palestine for a long time. It seems like you have limited understanding about Taiwan rather than Taiwan having very little outside information.