Colonel. because i know its a sin to call a Muslim kafir

I mean would you like if i called u a kafir just because you sin?
Alphanumeric does killing take you out of Islam?
How are they Muslims in the first place if they reject Prophet Muhammad (SAW) as the last messenger? Sigh, no point discussing with girls...they'll never accept advice even if their life depended on it.
Because like i said to be a
Muslim you must believe in the shahada which does not state that Mohamed was the last prophet anyway lets stop because i dont want to cause you more sins by calling Muslims Kafir

Muhammad is not the father of [any] one of your men, but [he is] the Messenger of Allah and last of the prophets. And ever is Allah , of all things, Knowing. {33:40}
Narrated Abu Huraira:
The Prophet said, "The Israelis used to be ruled and guided by prophets: Whenever a prophet died, another would take over his place. There will be no prophet after me, but there will be Caliphs who will increase in number." The people asked, "O Allah's Apostle! What do you order us (to do)?" He said, "Obey the one who will be given the pledge of allegiance first. Fulfil their (i.e. the Caliphs) rights, for Allah will ask them about (any shortcoming) in ruling those Allah has put under their guardianship." (Sahih al-Bukhari, Volume 4, Book 56, Number 661)
Narrated Jubair bin Mutim:
Allah's Apostle said, "I have five names: I am Muhammad and Ahmad; I am Al-Mahi through whom Allah will eliminate infidelity; I am Al-Hashir who will be the first to be resurrected, the people being resurrected there after; and I am also Al-'Aqib (i.e. There will be no prophet after me)." (Sahih al-Bukhari, Volume 4, Book 56, Number 732)
Are you still claiming that the diin does not tell us that Rasullulah (SAW) is the last Prophet? You can't just take pillars of islam without looking at them in details, for example the 2nd pillar is to pray salah at their fixed times...however does it tell us how to pray? no we need the Hadith to understand the pillars of salah just like we need Quran and Hadith to understand the pillars of Islam.