You hear about a few slytherin who are bad, because they had some interaction with Harry. You didn’t hear about all the others, who didn’t support the dark wizards. Not all dark wizards were slytherin either. And many slytherin didn’t support the full blood ideology.
You hear about a few slytherin who are bad, because they had some interaction with Harry. You didn’t hear about all the others, who didn’t support the dark wizards. Not all dark wizards were slytherin either. And many slytherin didn’t support the full blood ideology.
In the very first book Hagrid says:
Never once mentioning any of these “good” Slytherin was a creative choice, and we have to assume it was intentional.