Would this imply that the second church is Protestant?
Protestant is called "Kristen" in Indonesia.
Is Kristen the same meaning as Protestan in Indonesian?
Yes it is
I always find it funny and ironic that Catholics are not "Kristen" 0:-S
If Kristen is protestant, than how do they they Christian?
I agree and the translation of Kristen should be Protestant not Christian as the latter includes Catholics in normal English usage.