The Sami spent most of their time throughout history herding reindeer. There was never much of a warrior culture, tradition of soldiers, or even much war they participated in.
Interestingly, when the Nazis were in Finland, they took pity on the Sami, and did not harm them even when Finland attacked the Nazis. However, as the Nazis were ejected from Northern Finland into northern Norway, when the Soviets invaded northern Norway, the Nazis indiscriminately killed and destroyed the property of everyone, including the Sami, and pretty much levelled every settlement in northern Norway.
The stark difference is very odd. The Norwegian Sami were no more likely to fight the Nazis than the Finnish Sami were. The Sami property would also be of very little use to the Norwegians or invading Soviets. But the Nazis showed benevolence to the Finnish Sami and cruelty to the Norwegian Sami. The reasoning for this isn't really obvious, except maybe to keep anything useful from the Soviets, but the Sami didn't really have anything useful.
The majority of Sami live in Norway. These Sami have been mixing with Norwegians since the two grouos were in contact. Thus, the majority of Sami have at least a bit of Norwegian genetics, going back hundreds and hundreds of years. Similarly, almost all Norwegians in the north have a little Sami genetics.
Norway has by far the most Sami. After them, America actually has as many or slightly more Sami than Sweden due to immigration, historically and in recent years. Finland has very few Sami, and Russia has even less, about 1k.
Religiously, the Sami did basically the same as Native Americans. They held onto Shamanism for a very long time, and when most converted to Christianity, they largely had their own sect that served to be a way to organize against the state. There was a Sami Christian religious leader who lead a revolt in Norway, for example.