Dating someone with opposing views is the easier of two situations people can find themselves in.
The harder situation is when you date and marry someone with similar views to yours, but then 5, 10, 15, etc years into the marriage they get radicalized by family members or YouTube. And suddenly their opinions change overnight and you are legally bound to an angry, hostile stranger.
Showing my age here, but the first time I remember using the web was in the mid-90s when there were only a girl's of hundred web sites. Almost all of them were universities. But I remember going to playboy.com as a joke and being amazed that there's was actually a website for it. There was also a pizzahut.com website that pointed to a specific restaurant in San Jose CA.