Why Japanese in Japan are not good at talking politics in public

After I came to the US, I saw many people involved in politics.

In Japan, debating politics is kinda taboo.

I’ve been wondering why.

I think I found a potential great reason.

Discussing politics and doing political activities in public schools and public facilities is strictly prohibited in Japan.

The Iwakura City has a public conference room services which I use it for CoderDojo Owari,

The place prohibit to do any political and religious activities by its terms of services.

I think this may be coming from World War II how Japanese imperial government brainwashed Japanese citizen to go towards war using education, politics and religion.

Therefore, the government should not support or interact with politics and religion in any way.

Thus, the public facilities like city operated conference rooms and educational room prohibit any political and religious activities,

But I think this could be the by-product of how Japanese people lost interest towards politics.

I think the local city government should allow to use its public facilities to some political activities, which are not imperialism or anything based on hate, prejudice or privilege