Turning into "wehateporn"? That hole doesn't prove anything... I'm not even convinced a torpedo hit would create perfect round hole like that...
More typical torpedo hit probably looks like this:
and how does this prove in any way that US was involved? I mean, not even "prove", but how does it even suggest that US could be involved... besides the usual: "something bad happened, lets blame the US"...
Even if that indeed is a torpedo hit, it's just as likely that another Russian submarine shot this one by mistake... which would explain why the Russian government would want to hide it...