@ BG - you say "Flor if Isa PBUH is a muslim how ? how ? how ? can his followers be non muslims"

You believe that Jesus (Isa) was a Muslim and a prophet and Flor believes that Jesus is the Son of God and not Muslim.

Therefore you believe in two different men called Jesus...so you can't compare them to each other. So Flor is not following your Jesus that's why he is non-Muslim.

Although both religions believe there was a man called Jesus Christ. They don't believe in the same one. Muslims believe in Isa the prophet and Christians in Jesus the Son of God.