This is actually one of the big no-nos of social gatherings in general in the US too.
You don't talk about politics, religion or money. There's no point. It's a no win situation because you're only going to make somebody angry, never change anyone's mind and everyone else in the room will be uncomfortable and/or leave because they just showed up to see everybody, share food, find out how life and family is going and have a good time.
This is also one of the main reasons that it's so easy to talk about sports.
You don't talk about politics, religion or money. There's no point. It's a no win situation because you're only going to make somebody angry, never change anyone's mind and everyone else in the room will be uncomfortable and/or leave because they just showed up to see everybody, share food, find out how life and family is going and have a good time.
This is also one of the main reasons that it's so easy to talk about sports.