In what way is he insulting Muslims? Didn't Muhammad visit the Kaaba, throwing out the idols literally, destroying them, thus cleansing the Kaaba from the stains of Jahiliyyah? Wasn't this an insult to all those who believed in those idols? I find it rather ridiculous how you Muslims of all people accusing everyone of insulting your "holy religion/book/prophet" whenever they make fun of your beliefs while in fact Muhammad (as well as all the other prophets) allegedly fought with all what you call "credulous beliefs" of those eras. Credulous or not, absurd or reasonable, there were some people who were practicing those beliefs. There were some people who were worshiping handmade idols but Muhammad made a mockery of them by throwing them out. Why didn't he respect those people's beliefs? Because he was a message from God? I hope you realize that not everybody believes that Muhammad was from God and I hope you're aware of the fact that not everyone believes Qoran is a divine book. So if the Muslims believe that what Muhammad did was justified because he wanted to point out the absurdity of those Arabs' cults, you have to acknowledge that for those who don't believe in your prophet what he did was an insult to what the others had as their "holy" beliefs.
If someone comes now and says that he's converted to a cult in which the sun is the creator of all the universe, you'll call it backwards and retarded, won't you? He sure wouldn't be able to back his beliefs but are you able to back yours? Of course not. And as long as you can't come up with a convincing reasoning to prove that there's a God, that Muhammad is his message and that Qoran is his book, you can't do anything but putting up with everyone who calls your beliefs stupid.
The one who worships the sun is going through his cult' instructions; what he believes in, what he holds in absolute holiness. Wouldn't you find it stupid if he kneels to the sun doing his prayers? You would. So I'm telling I find it stupid seeing Muslims in big rows bowing down to literally nothing but a direction. I find it absurd seeing Muslims turning around a cube with all those white apparels. What's the difference here? Only because Muslims are greater in number than those who worship the sun doesn't mean they are right and the others are not.
You know, you, you above all the other people, cannot complain about those who mock your beliefs.