"Why do they stand in the way of the wishes of the Malays to practise their religion in their own country, when the Malays have never interfered or curbed them from practising their religions?"
Well, my friend.
You know where the UMNO HQ is in KL?
Head down there and ask them:
a) why for 40 years plus they have blocked the implementation of hudud.
b) why Johor, Kedah, Perak, Sabah, Pahang etc. do not have hudud.
If (as you claim) these are "the wishes of the Malays to practise their religion in their own country", why has UMNO not implemented it in these states long, long ago?