Thank you Raulmarrio2000 for your important comments.
First of all, I agree with you that it is not an obligation for gentiles to offer sacrifices, however, if they do offer them correctly, they are doing good for themselves and good for the world.
If the Gentile is offering a sacrifice to G-d {as defined by the Torah}, I don't believe also enjoying re-living an ancient practice ruins the sacrifice. Of course, this like any other question, related on how to offer the sacrifice, one can and should ask the experts, such as the Temple Institute.
Here is a link
http://www.templeinstitute.org/contact.htmThe attitude you mentioned Raulmarrio2000
since it's not an obligation for him, it's not worth taking the risk of making a mistake.
is also a viewpoint of some religious Jews.
However, another viewpoint found in the religious world, is that it's true, some actions are a little bit risky. But if it will help G-d to be recognized as king of all mankind and bring rectification to the world, "I'll take a reasonable amount of risk, because I love G-d and want to serve him in the best way".
These two viewpoints/attitudes are also found in the biblical book of Ruth. In chapter 4, a certain unidentified man is asked to redeem the parcel of land belonging to Elimelech. And because it is a good deed he initially agrees. But then when he finds out that in order to redeem the land he will also have to marry Ruth the Moabite convert, the unidentified man backs out, saying in verse 6: "I can not redeem it for myself, lest I harm my own inheritance".
Boaz on the other hand, studied the law well and he knew that it was permitted to marry Ruth the Moabite convert and he knew that it would help the kingdom of G-d and would help rectify the world if he married her.
Now how does the book of Ruth end. "and Boaz begot Oved and Oved begot Yishai and Yishai begot Dovid{David}." That is to say the king of Israel.