Did Ulbricht steal Bitcoin from Silk Road?

Could you elaborate on the accusation that Ulbricht stole Bitcoin from Silk Road? Was there any evidence to support this claim? Did he have any motive to do so? And if he did, how did he manage to keep it hidden for so long? Furthermore, what was the impact of this alleged theft on the Bitcoin community and the users of Silk Road? It would be interesting to hear your thoughts on this matter.