We Muslims believe the Quran is the speech of God. Thus the words in the Quran are not from us but from God alone. Yes God does not like that anyone be worshiped besides Him. But He dose not command us mere mortals to speak with disrespect about other's God's. Rather He says: "And insult not those whom they (disbelievers) worship besides Allah, lest they insult Allah wrongfully without knowledge.."(6:108)
Any Muslim who is thus heard or seen mocking another's faith, and insulting another's beliefs/Gods are then disobeying Allah's orders.