It is proper Netiquette to show kindness to classmates. Do be nice.
There are many components of kindness. A polite manner is kind. Friendly interaction, generosity, and consideration are part of it.
Being polite makes it easier to learn because it means to be agreeable. We can agree with each other and learn together. Classmates may become contacts or friends, which benefits the class with stronger relationships. Generosity and consideration further strengthen learning relationships.
Show kindness to classmates because it makes it easier to learn. Good relationships help the class.