Irrational ideas are still irrational - no matter who belives in them. Sure you can divide irrational ideas into how harmful they are, and treat them accordingly, but it doesn´t free you from pointing out and/or mocking the stupidity, if you see yourself as part of a community.
Community means you are sharing an environment, where your ideas and actions are affecting the identity of the participants, so it does matter if the ideas and actions are based on irrationality (illogical) or rationality (logical).
An irrational environment creates irrational people, which ends up segregating the community into weaker and weaker communities, because there is no rational for the differences (just look at the stand still of Islam, with all its different branches of Islam).
A rational environment creates rational people, which creates stronger communities, because there is a rational for the differences (just look at the achievements in science, since the
scientific method was adopted by the scientific community).
As a human you do have a choice here in life - you can go by instinct, and keep wandering around in the same darkness generations before you did, or you can use your intellect and build a
brighter future for you and the generations ahead of you...
Of course you can also choose to do nothing, which will just mean religion (ideology) will end in racial segregation: