I just bought a gorgeous book ...collection of Rumi's writings

Atheists and anti-religionists, and anti-spiritual types really would be condemning this.Every basher of all things spiritual are only genuflecting to this out of political correctness.
Why do the same people give honor to Islam, sufiism, and spit on all others if they're against any notions of God or even "spirit" of any understanding.?
What credibility is in that?
Where did the LOGIC and REASON suddenly go?
This is illogical.

Why do the same people give honor to Islam, sufiism, and spit on all others

Perhaps you are more observing, but I have yet to see any anti-religionist take sides with Islam or even Sufism and condemn other monotheists at the same time.

PS: spiritual types perhaps wouldn't like to see themselves as monotheists so we have to be careful here.