Can bacterial vaginitis cause pelvic inflammatory disease?

Yes. It is not a very common cause of PID, but it is a relatively infrequent cause of it. You'll find that a lot of the docs on this site will say no, but in the OB/GYN literature it talks about non STD causes of PID and BV is one of them. Luckily it is usually less severe than PID associated with gonorrhea or chlamydia.