Now, I don't like JB either. I think he's distinctly overrated: he's scrawny, practically doesn't wear pants, and has a nervous twitch regarding his hair.
That being said, those four reasons you provided are terrible, except for the first one.
2. People get kicked out of clubs every day. And usually it's not for being rowdy, it's because they lipped off to a bouncer or refused to tip the bartender. Sometimes they'll kick people out for hitting on the wrong girl. So getting kicked out of a club isn't the absolute worst thing a teenage celebrity can do.
3. I don't know if anyone's ever told you this, but the paparazzi are essentially stalkers. They watch your every move, they photograph you at your most intimate moments, following you everywhere and asking you questions. You can never get a moment to "be", because half of the world decided they like the way you look. They're glorified stalkers with cameras, and lashing out at the press is a typical thing to do. Sure, some people like Alec Baldwin take it a step too far, but you must remember that celebrities can never have a moment of privacy. They take a casual stroll with a friend and the headlines read: SEXY NEW ROMANCE! A couple has a minor spat, and suddenly: IS IT OVER FOR AMERICA'S HOTTEST COUPLE!? Everything is blown out of proportion.
4. Er...I find tattoos incredibly sexy. Only if they have a meaning, however. If they mean something to somebody, and it's enough to get them permanently etched on his skin, then that's fine. I think that's bold and great. But if it's just meaningless scrawled ink? Pfft. Get rid of it. The kid has a six-inch tattoo of Jesus on his calf.
And that brings me to my final point: I can't hate him. I don't hate him. He's a fellow Christian, and I can't hate him. His fashion choice is deplorable, I don't like the way he treated Selena, but other then that, he seems to be a nice kid. I think what most people really hate about him are his fans. Most of his fans are irrational, diehard tweenage girls who's voices haven't changed yet, and they'll defend him to his grave. So we get upset with them, because they're too pigheaded to see reason, and childishly run off and cry whenever you try to prove them wrong.
That's my main problem with him. His fans. And he can't control that, now can he?