SS is not the same as Waffen-SS. The Waffen-SS again had foreign legions. These Waffen-SS foreign legions were volunteers at first, later a mixture of volunteers, voluntolds, conscripts and in the end pressured and/or forced conscripts.
I don’t know about the individual motives of the person in question. But the Waffen-SS foreign legions are too much of a mixed bag to generalize.
In Eastern Europe many joined the Waffen-SS foreign legions to fight against the occupation of their countries by the Soviets. Their values and goals didn’t necessarily align with those of the Nazis, except that they had a common enemy.
Edit: The Waffen-SS was part of the German war machine and they did commit plenty of war crimes. I was commenting to differentiate between two different criminal organizations here (SS/Waffen-SS) and to explain how the recruitment changed as the war went on. It was a mistake on my part to omit this, given the sensibility of the topic. Please do not take my comment as an attempt at whitewashing the numerous crimes of various Waffen-SS units.