Principle of respecting others faith is universal, nowhere does it say such principles cannot be applied on Muslims of differing opinions. Such were the attributes offered by islam which attracted ppl by the hordes to this religion, while attitudes of exclusion and inclusion by virtue of sect/race/differing practices are the reason why Muslims today suffer from such narrow minded tunnel visions.
I do not agree with your interpertation of apostasy either, but this is not the issue being discussed here, we leave it for another day.