You must take responsibility for your needs, your wants, your pain, your actions and you must learn that there is no excuse for abuse. Blaming anyone else, even someone who abused or hurt you in childhood is not going to help you heal now. It will not help you meet your needs. It will not help you learn how to maintain relationships. It will not help you to find yourself.
Blame is a defense mechanism.
The pain is real. The pain feels immediate. It can also feel very overwhelming. If you have BPD and you do not learn to catch the triggers and see the patterns and take responsibility you will continue to drive people who care about you away and do great emotional damage to yourself and to others in the process. Taking responsibility for yourself and your emotions now is the only way to end the blame game.