There is an old saying, "Never discuss religion and politics." After all, those are the things that got him killed in the first place.
Think of all those religious frauds on TV begging for your money. If their millions of dollars evaporated what would they do? I doubt they would kill him but like the Pharisees of Jesus' time, claim he was in league with the devil. What would some of their unstable, crazed followers do?
Imagine if a man showed up who could heal the sick and raise the dead. "He does that because he's in cahoots with the Devil!" Even today, some of the lunatics would claim it. That's what they did in the first place.
I don't think the government wouldn't be too pleased either, because of his threat to its power. They'd try something and it would not be pleasant.
In order to understand the present and future, look to history. Human nature doesn't change.
The "Left Behind" nuts expect a war-like Jesus coming back with blood and iron. For that matter, that's why the Jews rejected him in the first place. Now it'll be Christians' turn to reject and murder him.
If another man such as Jesus showed up, the only way he would not be killed is to stay away from religion and politics. About the only way he could do that is to claim his powers were "scientific." Science didn't exist 2000 years ago.
I suspect the "I Fucking Love Science" pinheads would claim some sort of fraud was going on, but they're insignificant anyway. It's only the people with the power who would be threatened by him.
Two thousand years ago about the only way to get around was with a donkey. Today we have jet airplanes and a world-wide media. People throughout the world would know of a man who could heal the sick and raise the dead. There'd be a lot more people looking to kill such a man.
Even if the original Jesus really did return and came flying down out of the sky proclaiming peace and love many would not accept him and claim he was the anti-Christ and try to kill him again! Peace and love - what the hell? We want blood and iron and death and destruction - it can't really be him, just some satanic impostor!
People with wealth and political power - and the religious fanatics - are always threatened by someone who can upset their apple cart. They're not interested in the truth, only their hallucinations. They'll even murder what they consider a threat if they can get away with it.
Why people think the Four Horsemen of the Apocalypse is really the Messiah is beyond me. But it doesn't say much about people, does it?