From viewpoint A:
Fundamentalism & Extremism is wrong irrespective of the religion.
So these things should be stopped.
From a different point of view:
Anyone or any sector can say/ preach any rubbish. Sri Lanka is a democratic country. So it's the Buddhists', Catholics', Muslims', Hindus' responsibility to protect themselves from these evangelical Christian mythologies. Because no one can change your religion by force. You have to change it by yourself. So if you're confident about yourself, then no need to be afraid of these things
But if you think you will get attracted for money/ power etc. and change your religion... OK forget about metta, muditha, karuna & upekkha and hit the buggers