Why are people against Mono? It is FS, so its licence is definitely not a threat. The most popular reason seems to be the fear of *possible* violation of software
Offtopic: Even after taking into account the Novell marketing, those Mono guys are doing some wonderful work. Take a look at the number of new apps based on it (f-spot, beagle, tomboy etc). I don't think anyone should be apologizing for mentioning beagle, a FS, on FSF mailing list.
I dont see any reason to consider Mono as evil.
Leaders of Mono project (former Ximian) had taken stands which were harmful for the free software movement( or at least many in movement thinks so). This makes some people sceptical of their project including Mono.
From the point of view of software freedom KDE-Gnome war is over. KDE
is as free as GNOME. Some time I find that KDE people more committed towards philosophy than GNOME.
regards arun.