Sort of. You can't expect to change ruby's constant system to be insensitive, but if you're OK with passing in strings, this might work:
class Module def include_insensitive(*args) args.each do |m| include(const_get(Module.constants.grep(/^#{m}$/i).first)) end self end end
module M def im_in_m :hi end end
class C include_insensitive "m" end
C.new.im_in_m #=> :hi