Yeah, but who defines the laws of Islam? You assume that such laws are written in stone when they arent. Islam is open to interpretation... Thats why there are so many schools of thought. There different degree of variance but at the end of the day, you have no right to claim any ownership of Islam, and you cannot tell others their beliefs are wrong...
I am not telling them their beliefs are wrong but if they try to change Islamic teaching to their own baked religion then thats wrong and it will be wrong.
Islam isnt a thing that you can play with it as you want it to be. You have to follow it as a religion and changes you wan to perform in it isnt allowed anymore after what Hazrat Muhammad (PBUH) preached us.