Comment by diggan
> It's completely fine to have different political views if you both act like normal reasonable people.
Yes, this is true, you can have different political views and still be friends/lovers/partners/whatver.
What parent said though was "directly opposing political views", which I'd also agree with is inviting trouble, as it'll leak out in constant tensions and frictions. Simple things like "We shouldn't drive as much as we currently do" can lead to heavy argumentation if the underlying reasoning cannot be understood by both parties.
In real life, people might not speak about parties or political figures, but their everyday actions are driven by their values and beliefs, which also ends up reflected by who they vote for. Politics is everywhere, even where people don't speak of it directly.
>> We shouldn't drive as much as we can do
I wouldn't consider this a political view. It's a lifestyle choice based on personal beliefs. Two people can be fully behind the idea we need to do something about climate change and have different ideas on how that should be done. And I think that's part of the problem in recent times - instead of politics being about the big ideas and how a country is run it's become about small personal choices. If a person has heavy arguments with a partner about how much/little they drive I would say they've got an issue with a need to control others, rather than just a strong political opinion.