Sounds like this bomber needed more range time. ;o)
I wouldn’t claim responsibility either if all I could kill was one civilian. Oh, and myself.
The suicide bombers are not committed idealists. They are weak minded people who are manuvered into the job by whatever means are necessary. According to Israeli articles they are often high on drugs, so there is every possibility that they are so mentally compromised they can’t determine when or where is a good time to meet Allah. In more advanced countries the actual detonation is by a remote observer. Probably for this reason and also in case the bomber has a sudden surge of rational thinking.