The Slytherin house would probably be outraged. Snape is one of their own, in a sense. They would demand justice for Snape and might even use this incident to fuel their long - standing rivalry with Gryffindor. There would be a lot of tension and conflict within the Hogwarts community as a result of this act.
Some in the wizarding community might be in awe. They would see it as a great honor for Harry and a chance for the wizarding world to gain access to an even deeper level of magic. After all, Hecate is a powerful figure in magic lore. However, there would also be those who are fearful. They might worry that this union could disrupt the balance of power that has been carefully maintained in the wizarding world for centuries.
Some in the wizarding community might be very accepting. Harry's friends like Hermione and Ron would probably be supportive, seeing how happy he is. However, there would also be those who are more traditional and would be against it. Pure - blood supremacists would definitely not like it and might cause some trouble. The Ministry of Magic might also be a bit hesitant at first, worried about how to handle the situation in terms of secrecy laws and the like.
Some wizards might be very confused. In the wizarding world, they are used to magic and spells, not religious praying. They might think Harry has gone a bit mad or is dabbling in some strange Muggle practice. However, some more open - minded wizards could be intrigued and want to learn more about it.
Some fans might be shocked at first. But it could lead to a more open attitude towards fan - created works in the wizarding community. It might encourage more people to write fanfiction, knowing that someone as strict as Snape approves.
The Ministry of Magic would likely be in chaos. They would try to find a way to stop the spread and hold Harry Potter accountable. There would be a lot of panic among the wizards and witches, with many trying to flee or find a cure on their own.
Most would be shocked. The Gryffindor - loving community that adores Harry would be appalled at his choice to marry a former Death Eater's wife. There would be whispers and rumors everywhere. However, some might see it as Harry's way of promoting unity and forgiveness. The pure - blood families would be in a state of confusion. Some might be angry that Narcissa is marrying outside their traditional pure - blood alliances, while others might see it as a way to regain some status through Harry's heroism.
Snape would probably be very conflicted. On one hand, he has a long - standing grudge against James Potter, Harry's father. But on the other hand, he loved Harry's mother, Lily. So, he might be cold at first, but then his sense of protecting Lily's son could kick in. He would likely be very strict with Harry, as he is with all his students, but also secretly keep an eye on him to make sure he's safe.
There would be a great uproar. The pure - blood families who are used to the old ways and the power structure of the Ministry would be horrified. They would see Harry as a rebel who is disrupting the peace. However, the younger generation of wizards, who have grown up hearing about Harry's adventures and heroics, might be inspired. They could start to question the inefficiencies of the Ministry and support Harry's vigilantism, which could lead to a generational divide in the wizarding community.
The Death Eaters would initially be overjoyed. They would think that with Harry on their side, they are invincible. But some of them might also be suspicious of Harry's motives, fearing that he is a double - agent. As for the general wizarding population, they would be terrified. Harry was seen as their hope, and now that he has joined Voldemort, they would feel completely hopeless and defenseless.
Most of the wizarding world would probably be shocked and disgusted at first. After all, mating with a snake is not a normal or accepted practice in their society. However, some open - minded wizards might see it as an interesting new form of magic and be curious to learn more about it.