First of all, I don't hate any God, whoever it is Vishnu or Shiva or Krishna. I respect Vishnu (especially Lord Venkateswara of Tirupati) as much as Shiva, but I like Shiva more when compared to other Gods. I'm neither a Shaivaite nor Vaishnavaite by birth rather my family worships a Grama Devata which comes under Shaktism.
I often get offended when some users demean Lord Shiva and his family. I know Hinduism has many schools and Shaivism, Vaishnavism and Shaktism are different sects who believe their respective Gods as Supreme. There's no wrong in believing your favorite God as Supreme but some users deliberately censure or demean Shiva and Shiva Purana. They reject entire Shiva Purana citing it as "pool of interpolations". I don't bother whether they believe Shiva Purana or not but they write these kind of statements in their answers. New users are being misled and brainwashed with their statements, which I feel it as unscrupulous.
Additionally, I request everyone to write their respective perspectives before answering these kind of questions. There are many answers on this site which say "Vishnu is Supreme" overtly without citing perspective. Also, a user of this site overtly claims "Lord Vishnu is Supreme" by citing some unreliable blogs. As most of users on this site are Vaishnavaites, these issues don't capture attention of most of the users.
How should I react to these situations or in general, how should people react when someone offends their faith? Again, I request everyone to include perspective or scripture (either Vaishnava or Shiva), which says their respective Gods as Supreme. Also, I request moderator to make a mandatory rule to include perspective or School of thought in their answers.