Making a mockery out of the last sermon of the Holy Prophet (SAW) I think no mulim will tolerate. Either you accept that the Holy Prophet (SAW) stated that there will be no prophet after him or you think he lied. Its that simple.
just shut your mouth! and keep it closed! Do you think you are doing a favor for your Prophet (saw)? You are not! Refrain from telling the people who are Muslims or not! Don't try to become God! Don't do Shirk, warna tu Kutte ki Mot marre ga. Yeh Khuda ki Sasaa hoi gi phir!