Here's his reasoning for the madness, translated via Mashable:
“Apple is a company that ‘violated’ European consumers’ rights. They refused to reimburse me, I told them: ‘Give me my money back’. They said no. So you know what’s happening? This is happening!” – before wrecking another iPhone.
Although, he doesn't get all that far before being apprehended; but still how did he even get anywhere in the first place?