Gentlemen and women...the simple concept is if you don't have faith in certain rituals and ways of worship you should nevet go there. It is in the interest of both the religion followers. That is the reason in India we had a system of wearing marks on forehead / body to indicate what path he is following like Shaiva / Vaisnava / Shaktha / Tantrik / Ganapathi / Surya etc..this use to ensure that others will not damage his devotion or spoil his faith and this is only for spiritual progress and nothing else. But now we (Hindus)don't continue to practise that (using marks)in our daily life . This is a big issue after Parsi / Chistianlity / Islam faith came up and we cannot identify the faith. If we cannot identify the faith we may hurt the other person due to our ignorance of his faith. Sraddha purva surva dharma ..manorathah ..phalapradaha..sraddhaya sadyate sarvam..sraddaya tuhsyate harih..