There are clearly 2 ways to look at this.
One way is the way Indians are looking at it, the way that interprets this as secularism and pluralism and an egalitarian society, that a muslim out of respect for the hindus muslims dress as hindus and this is an example of the love between the two.
But there is another argument, the Islamic argument. There are arguments that Islamically it is not allowed to dress up overtly as non muslim Gods and Goddesses and it is disallowed promoting their culture and lifestyle. Many muslims will view this negatively.
Which way a normal person looks at this picture is based on the persons upbringing, religion and thinking. Indians need to focus on not swallowing other religions (ie same laws for Sikhs, Jains and Budhism and treatment of them as a branch of Hinduism) so that muslims dress up as hindus but to try and let Islam and muslims thrive equally with their own culture and traditions. This shows a weak policy, insecurity and pettiness and some muslims will definitely not agree with this kind of thing. Muslims shouldn't have to give up their culture. This may represent religious harmony for many but the image also portrays the gradual elimination of Islamic customs and thought process in Indian occupied regions.
Muslims dont have to do it,they do it because they want to,not because they need to.Most muslims dont do this but they dont bother eating prasad which we give them after offering it to god.There are some wahhabis but strict wahhabism in india will alienate the muslim completely and he will have to move to saudi to earn a living.
thats what everyone is saying,religion plays a part but only a part and that can sometimes be miniscule also.Culture is something often reliant on religion. Muslim men have a culture to keep beards. Muslim women have a culture of covering up in burka's or scarves or abayas. Denying us our culture, our unique identity in favor of this we are all one is a mistake. As a Lucknowi I do not understand the insecurity of hindu Indians who want to label all in some or another way Hindu. It is a mistake and a misguided and insecure policy. It is best to understand that culture may be decided partly by geographic location and demography it is also decided by their dominant religion.