“There are so many attached [beliefs] to Christianity” - A man I overheard in a coffee shop.
Take, for example, Demonology; you have to assent to the idea that there are very literal demons that are doing stuff, influencing people, etc. in the world (barring the cessationist sorts of views I guess, but even then, idk). They are not something you can see, but you have to have faith that they exist it seems.
Another one is hell; one must casually accept that hell is a real thing (either as the literal or figurative place) where the souls/being of others will suffer forever.