When did the fans turn on John Cena?
 

Yeah. When?

Earliest I remember, is during his feud with Kurt Angle. The one where Kurt said that the fans would cheer for him no matter what he said.

Up until that point, it seemed like the fans were firmly behind Cena all the time.

Yeah, as soon as he was moved to Raw and started feuding with Kurt Angle.

Smackdown was the wigger/Hispanic show and raw aint so they booed him

Yeah, that's why.

When he first came to RAW, though, they didn't boo him. I think. Like when he was facing Jericho/Christian.

Woo woo woo, you know it!

At least Shisen Kopf gives POWER to WWE's Hispanic fans...according to him, they set the standard as to who will be cheered or booed.

So, they booed John Cena first, the American fans took notice, and to this day, he still gets booed. That's what's up.

Summerslam 05 w/Jericho came to mind

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I dont know, it doesnt sound like the fans were too against him (plus, he was still kinda funny/ witty then) The first time I can really remember pure fan hate was at One Night Stand 06 "throw it back" moment

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The Summerslam match with Jericho turned the tide.

SummerSlam against Jericho was when the tide really started turning. That's when you started having the high pitched Cena chants against the manly chants of the opponent. After that it was all downhill for Cena cept for some moments when he got the fans on his side but that was just the main starting point.

I didn't mean the MINUTE Cena showed up on Raw he got boo'd, I meant moving to Raw was the beginning of the end, so to speak.

He definitely got boo'd in his feuds with Jericho, Angle and Edge before this PPV.

for me it was when he beat shawn micheals at Wrestlemania

Spot on with Jericho/SummerSlam 05. WrestleMania 22 was where the anti-Cena sentiment couldn't be ignored anymore.

They probably should have seen it coming at least with the Angle part.

I mean, before feuding with Cena, he was feuding with Eugene. And the fans were willing to boo a Retard instead of Angle. Think about that for a moment.

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The fans would cheer for Angle no matter what he did.

Makes me sad how good Christian was in that Cena feud, now he resorts to shitty cheap heat like dissing the local NFL team....

It's probably around the time that he stopped writing his own material and started little bags of peanuts at people, telling them to choke on these nuts. It was the progression from thugged out rapper who doesn't give a fuck to Vanilla Ice on roids to the eventual Hulk Hogan 2.0 we have now.