I think that Friar Laurence is to blame for the deaths of Romeo and Juliet. Even though he was against it, he still agreed to marry Romeo and Juliet. He then helped conspire with them, and when Romeo killed Tybalt, hid him from the guards. He then devised the plan of Romeo going to Mantua, and came up with the idea of faking Juliet’s death. He also did not send a horseman to tell Romeo swiftly of the plan, but a slow moving friar, who got sidetracked, and ultimately held up by helping the sick. Then, when finally in the tomb, he left Juliet in the fear of capture, which allowed her to kill herself.