Rise of Streamers. Uneducated man childs giving advice to teenage boys, while "living the life"...

Imagine an angsty teen with blue balls hearing the opinion on women from his idolized, expensive car driving, pumped up tattooed narcissist how to pick up girls every evening.

That shit is toxic populism in times with lots of uncertainty about the future.

Prior to the Internet people got a lot of their political opinions from mass media, which would explain why everyone thought the same back then.

https://theconversation.com/the-draw-of-the-manosphere-understanding-andrew-tates-appeal-to-lost-men-199179

My guess (based on no hard facts, bust purely speculation): This statistic is for the age group of 18-29 year old. Young people tend to be more liberal and grow more conservative as they age.

There might also be a political or economic component, but i think age is the primary reason why these graphs mostly show a liberal bias for the samples.