Many Americans, especially the hard-core stoners I know, go out of their way to avoid any cannabis that has been mixed with tobacco. The spliff is a common sight in smoking circles, and provides a helpful cover for the skunky smell of sinsemilla in situations where toking is risky, but given the health risks of tobacco and the lack of risk with weed, it's easy to see why someone would opt out of the nicotine rush.
In Spain, there is a historical context for the combining of hash and tobacco. While hash may seem like a treat at home, and I've seen dabs and artesian non-solvent extractions line the shelves of dispensaries across the nation, there is some beautiful hash in Spain that is simply unlike anything in the United States. It comes from a hash culture- being so close to Africa, old techniques that have been passed down through generations, and resulting tools and methods meant solely for smoking the combination of tobacco and hash like chillums and bowls to mix your smokeables in so you can roll it up just right.
Mixing up some dank in the bowls provided
These bowls were provided in many of the social clubs I visited, but some locals also had their own, some with great sentimental value. There were a bunch of new smoking techniques revolving around the combination of hash and tobacco I learned while in Spain- I met some folks who loved smoking bongs filled with tobacco and hash! The method involved passing a cigarette through a lighter until the heat vaporized much of the nicotine, then emptying the contents into a bowl with broken up hash, applying more heat to better mix the two substances and then packing the bong. I was quite skeptical, but the enthusiasm of my new friends finally convinced me. I'm not a convert though- while the hit tasted absolutely spicy and delicious, the head rush from the nicotine was a bit too much for me to enjoy.
In speaking to hash spliff smokers, the consensus seems to be that it is a fundamentally different high than toking on flowers. It's more energetic, it's a clearer feeling, it is easier to incorporate into regular use- these are all things I have heard frequently in my European travel/hash discussions. It's clear that there is weed culture everywhere, and fascinating to see how it has evolved based on the kind of weed available and the society that surrounds it.
Two varieties of hash at a club in Barcelona- That dark gooey goodness is hard to find state-side!