Rudolph lived at about the same time but was married to a woman who did not interest him much and had a "love" relationhip with a woman,with whom he later died in a murder/suicide arrangement at his hunting lodge. He too was thirty.
I think that there was probably some weakness in Rudolph,spoiled and energetic he may have been involved in some shenanigans but your case for the Hapsburg's involvement in these silly but dangerous cults is weak.
I posted who I thought backed this cult movement. I don't know why you think I meant the entire Hapsburg line?? I even bolded out that it was the minor members of the clan that got involved in this cult. Verstehen Sie?