Current calliph of islam isn't Mirza masroor quaidani, basically he isn't even Muslim. Ahmadi's are non Muslims.
When a Muslim believing in prophet Muhammad(PBUH) Muslim also believes that Jesus is the prophet of Allah (SWT) and also have belief in other prophets of Allah (SWT). The main belief of islam is that Prophet Muhammad(PBUH) is the last Prophet and messanger of Allah (SWT).If any other muslim or any other person claims to be the prophet of Allah,he is a liar himself and opposing the main belief of islam. Which mean that he will not be Muslim.
Here ghulam Ahmad quaidani claimed that I am the next prophet of Allah then how is this possible that he will remain Muslim.He himself is opposing the main belief of islam and the claiming that I am Muslim. So Muslims does not recognise him as a Muslim prophet or messanger of Allah (SWT). He will be having his own religion ahmadi's but non- Muslim
"When a person believing in prophet Muhammad(PBUH) as last prophet of Allah is Muslim"
"When a person believing in Jesus as last prophet is Christian"
Then how is this possible that believing in ghulam Ahmad quaidani as last prophet of Allah(SWT) and you will remain Muslim or Christian he will be having his own religion.
"And Muslim community does not recognise Mirza masroor as current calliph of islam he may be the calliph of ahmadi's religion because mirza masroor believes ghulam Ahmad quaidani as the last prophet. Mirza masroor himself is opposing the basic concept and belief of Islam. So according to Muslims he isn't a Muslim.