Why can't Muslims attend Hindu festival celebrations?

India actor, Salman Khan, attended a Ganesha celebration in Mumbai. This was not liked by some Muslim religious leaders. They issued a fatwa against Salman Khan calling his act anti-Islam. Does Islam prohibit Muslims to participate in functions of other religions or it is yet another attempt to misinterpret Islamic teachings? I believe Islam does not prohibit this. It is only to isolate Muslims from joining national mainstream.

Whenever I pass in front of a Temple, Mosque, Church or a Gurudwara I bow my head. All these are the house of God. They remind me about God so that I can pray to Him.

Do you also feel the same way?