Well, both could be used, but the context would be a bit different in each case. For example, one might say:
"In my family we were raised with the saying, 'waste not want not'; however, no one can completely avoid waste in their lives."
If referring to a specific time in the past like that, I would use "were".
However, if we are speaking about people in general and speaking about the present rather than the past, then "are" is more appropriate. For example:
"We are generally raised to be polite nowadays."
"Nowadays children are raised with a connection to technology that is stronger than any previous generation."
Hope that helps,