favour_the_countryside_basques_decision_pluralist_path_scripted_effect

favour_the_countryside_basques_decision_pluralist_path_scripted_effect = {
	faith:basque_pagan = {
		# First, we mostly only need to remove Christian Syncretism & replace it with Islamic Syncretism.
		remove_tenet = tenet_christian_syncretism
		add_tenet = tenet_islamic_syncretism
		# Then set the faith's fervour to a middling/low level, since you've messed with it.
		change_fervor = {
			value = major_fervor_loss
			desc = fervour_loss_temporal_meddling
		}
	}
	# Bonus opinion with every neighbouring Islamic ruler & their vassals, who appreciate the direction you're going in.
	## Compile a list.
	top_liege = {
		if = {
			limit = { religion = religion:islam_religion }
			add_to_list = pleased_rulers
		}
		every_vassal_or_below = {
			limit = { religion = religion:islam_religion }
			add_to_list = pleased_rulers
		}
	}
	every_neighboring_and_across_water_top_liege_realm_owner = {
		if = {
			limit = { religion = religion:islam_religion }
			add_to_list = pleased_rulers
		}
		every_vassal_or_below = {
			limit = { religion = religion:islam_religion }
			add_to_list = pleased_rulers
		}
	}
	## And apply some opinions.
	every_in_list = {
		list = pleased_rulers
		custom = favour_the_countryside_basques_decision.tt.all_neighbouring_islamic_rulers
		add_opinion = {
			target = scope:religious_leader
			modifier = pleased_opinion
			opinion = 30
		}
	}
	# We get a small modifier for clergy approval, since they're a bit peeved at the tenet-messing.
	add_character_modifier = fp2_friend_of_the_old_ways_modifier
}

As written in game/common/scripted_effects/00_major_decisions_scripted_effects.txt.