Use of term 'Other' is very bad and extremely bad in a Hindu forum. Why 'other'? Can't we still aren't able to get the difference between 'we' and 'they'(or 'other').

In my organisation(http://vedgov.in) there are Jains and a Sikh. Are these guys fools? I have never meet a Sikh(lives in Rajasthan) who don't worship on of Hindu god. They are hindus.... In Sikh Kingdom, beef was strictly banned...

So why they are said 'other' Dharma???