One more thing Vinaya "untouchabity" was a disgraceful practise agreed,has shame of slavery practise by even the churched stoped them fromconverting the poor needy people,NO. So why do you beleive christains and muslims should not be converted inspite of the wrecked cat system.Think over it,when you have no problem with christains past practise of slavery,coonisation and anti semitism ,hence defend their right to convert people,but at the same time do not wont to forget only one past draw back of the hindus.