I think you might want to look further down in the file to here:

<agents>
<denounce_inquisitor_base_chance float="35.0"/>
<denounce_priest_base_chance float="33.0"/>
<denounce_attack_modifier float="1.0"/>
<denounce_defence_modifier float="1.0"/>
<denounce_chance_min int="5"/>
<denounce_chance_max int="95"/>
<denounce_heretic_attemp_modifier float="1.5"/>
<denounce_character_attemp_modifier float="0.5"/>
<assassinate_base_chance float="12"/>
<assassinate_attack_modifier float="1.0"/>
<assassinate_defence_modifier float="0.0"/>
<assassinate_public_modifier float="1.0"/>
<assassinate_personal_modifier float="1.0"/>
<assassinate_counter_spy_modifier float="1.0"/>
<assassinate_agent_modifier float="2.0"/>
<assassinate_own_region_modifier float="0.7"/>
<assassinate_assassinate_attr_modifier float="0.1"/>
<assassinate_chance_min int="5"/>
<assassinate_chance_max int="95"/>
<acquisition_base_chance float="30.0"/>
<acquisition_level_modifier float="3.0"/>
<acquisition_attack_trade_rights_modifier float="1.3"/>
<acquisition_defence_trade_rights_modifier float="0.7"/>
<acquisition_chance_min int="5"/>
<acquisition_chance_max int="95"/>
<inquisitor_crt_heresy_divisor float="1.0"/>
<inquisitor_crt_pfp_modifier float="0.5"/>
<inquisitor_crt_pfp_modifier_min float="0.0"/>
<inquisitor_crt_pfp_modifier_max float="1.0"/>
<inquisitor_crt_chance_min float="0.0"/>
<inquisitor_crt_chance_max float="0.1"/>
</agents>

the denouce_ lines might be more appropriate.
Try lowering the denounce_character_attemp_modifier to like .1 or .05 and see what happens. or maybe it needs to be raised. Not sure.