No. The +5 only applies to units of the religion's founder when within the borders of a city following the religion. I'd get no benefit from it. The only benefit I'd get from your religion is whichever follower belief you took.
Regarding the spearman there's a highly liikely chance that it will attack across the river on its turn. Each of the units will take about 30 points of damage. At that point if you attack the spear you should force it to retreat. At that point if you attacked it'd retreat and I'd be able to intercept it NE of the mountain. I don't know that it would cross the river with both units there but we can give it a shot, though.
Regarding the spearman there's a highly liikely chance that it will attack across the river on its turn. Each of the units will take about 30 points of damage. At that point if you attack the spear you should force it to retreat. At that point if you attacked it'd retreat and I'd be able to intercept it NE of the mountain. I don't know that it would cross the river with both units there but we can give it a shot, though.
Sending units to their death since 2017.
Don't do what I did: PBEM 3 - Arabia , PBEM 6 - Australia This worked well enough: PBEM 10 - Aztecs Gamus Interruptus: PBEM 14 - Indonesia
Gathering Storm Meanderings: PBEM 15 - Gorgo You Say Pítati, I Say Potato: PBEM 17 - Nubia The Last of the Summer Wine: PBEM 18 - Eleanor/England
Rhymin' Simon: PBEM 20 - Indonesia (Team w/ China)
Don't do what I did: PBEM 3 - Arabia , PBEM 6 - Australia This worked well enough: PBEM 10 - Aztecs Gamus Interruptus: PBEM 14 - Indonesia
Gathering Storm Meanderings: PBEM 15 - Gorgo You Say Pítati, I Say Potato: PBEM 17 - Nubia The Last of the Summer Wine: PBEM 18 - Eleanor/England
Rhymin' Simon: PBEM 20 - Indonesia (Team w/ China)