It's obvious that people have different opinions on politics, both in their countries and others.
The thing is why and how they avoid talking about it?
And is there completely nothing about it they are allowed to discuss?
Please discuss the topic "People and politics"!
In the United States, it is commonly said that whenever you are in a group of people who are not close personal friends, there are three topics you should not discuss: "sex, politics, and religion." Experience shows that it is just not possible to keep discussions of these topics friendly. They always get more and more heated and eventually someone gets angry.
If someone is discussing politics and it is a particularly prickly subject that you'd like to avoid, there are many things you can say which won't be offensive in the slightest.
"I don't mean to be disrespectful, but I would prefer if we didn't discuss politics"
" I am not versed enough in this topic of politics to discuss. Do you mind if we change the subject?"
"Sorry Sir/Madam, I don't publically discuss my political views"
" I respect your opinion, however I do not wish to disclose my personal or political views at this moment"
This way you are being polite yet succinct. Your peer will understand and should respect your request if you address your request in a gentle manner. People enjoy debating politics because it gives them an excuse to argue! I don't think I've ever had a discussion about politics that hasn't become heated.
You can be direct and say "I don't like to talk about politics." or just "Let's talk about something else." It's common for people to avoid it.