Heres a very simple answer to you all. If you guys dont get this, you guys have some serious problems.
Muslim Umma believes there is an Imam Mehdi AS yet to come. Ahmadis believe exactly the same. Muslim Umma also believe that the coming Imam Mehdi must be the one guided by Allah. Ahmadis also believe the same. Guided by Allah Himself and not to call Him Prophet of Allah is not acceptable, if He's from Allah, Hes prophet. ( with that comes the question of Khatm e naboowat which is a different topic so i'd not discuss it here )
Hazrat Isa AS as other Muslims believe was raised up to heaven, and when he AS comes back, He AS will not bring new law BUT follow the law(sharia) of Prophet Muhammad PBUH. In other words, Prophet coming after Prophet Muhammad PBUH is possible ( according to other Muslims ). When Ahmadi Muslims say the same thing, they are kafir and out of the fold of islam but when other Muslims say this , everyone agrees with them.
One more thing to keep in mind everyone is that throughout the history of Islam, if anyone claimed to be send by Allah and claims himself to be prophet, Allah says in Quran that if He's an imposter, He will cut his throat. We have seen such instances happening in the middle east when someone claimed to be Imam Mehdi and within few days , the govt of Saudi arabia got him killed. If He was sent by Allah the almighty, He would have been saved. What do you see now? Ahmadiyya movement in Islam flourishing around the world. Millions of people around the world do ba'it per year. You think you people are the first one to be against Hazrat Mirza Ghulam Ahmad AS?.. wrong. There have been people before you, people in His times , and there will be people like you who will continue to spread wrong information without any knowledge and without the intention of getting the info right.
Ahmadi people's religion is the religion of Prophet Muhammad PBUH. Hazrat Mirza Ghulam Ahmad AS has always said in his books that whatever He is, is because of Prophet Muhammad PBUH.
For goodness sake, read His books with neutral mind and find out the truth. You people are only expert in taking things out of context and publishing it all over the internet. Let me tell you one revelation of Hz Mirza Ghulam Ahmad AS. He once said something like ( dont have the exact wording in front of me right now ) " Allah will make 2 to 4 ". When asked what that meant he said he doesnt know. If a person whose making stuff up to misguide the ummah, He must know what hes talking about. In this case He had no idea what Allah said to him. He received it from Allah and conveyed to the people.
In the 'faith' (note i didnt say 'religion' ) of ahmadiyya jamaat, they believe that Allah used to speak to people who were dear to Him, He still speaks to people who are dear to Him, and He will continue to speak to people who loves Him.
as far as Ahmadis considering Muslims non-muslims.. I ask you, if there was an Imam Mehdi RIGHT NOW, and according to you He seems to be the right one, you did bait on him.. what about the people who did not do bait?.. according to you, wat should they be called?