People are such sheeple. I've seen people post it saying things like "Right on!" and "God bless Tebow for the brave stand he's taking for God!" and "It's awful the kind of persecution he's facing!" Persecution complex, distorted information, and "us vs. them" are all clear signs that you're practicing an unhealthy form of religion, or are part of an unhealthy religious group or cult. If nothing else, the responses I've seen to the contrived and manipulated question within this photo demonstrate that the "faith" of most people is just an emotional investment - with very little of anything spiritual involved - no deeper than their allegiance to a particular sports team.
The photo is propaganda, and at that, it's quite similar to the tactics Jim Jones used as he made the call to drink the Kool-aid (which you can hear on the so-called "death tape"). Distorted information, persecution complex, us vs. them. If you want to shut your brain off and respond emotionally to propaganda, have at it. I just think it's sad that so many who claim Christ are so willing to be manipulated.
The photo, and the "question" it raises, falls into several forms of propaganda techniques - Appeal to fear, appeal to ignorance, appeal to prejudice, black and white fallacy, common man, demonizing the enemy, flag-waving, oversimplification, scapegoating, stereotyping, and most of all, the straw man.
No one has said that the picture on the left is "OK". No one really cares. Personally, I'm not familiar enough with the Quran to have an opinion on whether or not this fits within the proper etiquette of Islam. I can only assume that this group of Muslims had all the necessary permits and clearances to do what they're doing. If they all showed up and started doing this in my driveway, it wouldn't be "OK", but otherwise, it's really not a big deal to me one way or the other. I'm not Islamic, so I don't lose sleep over how people represent Allah or the Muslim faith.
As far as the picture on the right, I'm not aware of anyone who's made any aggressive efforts to stop Tebow from praying. I can tell several things from the manner in which he prays, though. He wants to be seen. He wants you to notice his prayer. If he didn't, you wouldn't. That's the bottom line on it. He comes from the Christian homeschooling movement, and his "faith" is as much about promoting and witnessing for a "Christian culture" - specifically white, neo-conservative, sprinkled with the parsley of the Victorian era, culture - as it is about any personal relationship with Christ. He's obviously more steeped in the movement's cultural ideas than he is in any understanding of biblical text, particularly the example and teachings of Christ - who sought privacy for his own prayers and taught us to do the same (never making them a spectacle).
If I were to ever meet Tebow, I'd definitely make the suggestion that he stop praying to be seen and making a spectacle out of his prayers, and I'd ask him his thoughts on Matthew 6...but I don't know of anyone, including me, trying to outright stop him from doing what he's doing. It's a free country. He's free to practice his religion (within the confines of the law) however he chooses.
The person responsible for putting this photo/question together tapped into Islam because, just as "the west" is the Great Satan of radical Islam, Islam is one of several Great Satans of fundamentalist Christianity. If you want to stir people up and manipulate their emotions, you do it with their Great Satans. Common enemies are derived from common fears. Fear is the most powerful manipulator there is.
Jim Jones once had some of his men go out into the treeline on the edges of Jonestown and, under cover of night, fire rifles into the camp. He told his followers that these were their enemies from the outside world, and these enemies desired their deaths - as proven by Jonestown coming "under fire". This ploy proved masterful for Jones, as on Kool-aid D-Day all he had to do was to point at this incident to "prove" to his followers that their enemies (law enforcement and the US government/military) would "parachute in on them", torturing babies and seniors before killing them all.
This kinda reminds me of a conversation I've been involved in regarding conservative politics. All a GOP candidate has to do is yell "Christian! Christian here! Vote for me because I'm a Christian!" and the evangelical community automatically shuts down their brain and jumps on the bandwagon. When a politician takes the platform and starts talking faith, it's bull. Christianity has become a form of propaganda all its own within the political spectrum.
Don't fall for ridiculous propaganda. Use your brain.