The issue here between beliefs even buddhist and proper humanist will tell you. It aint that a humanist is better then a buddhist or more logical then catholic or smarter then a bible thumper. RCCanA little too much projection there. There is no humanist way. Humanists aren't better than any other human, which is what the humanism is about. At least conditional respect for all humans is part of humanism. Some humanists try to maintain radical respect for all. Humanists are different however in that there is no belief, not even belief in humans that is required, and humanists are not a group. They do form social groups, that is a human trait, but the social groups are based on a common interest rather than a belief and generally are inclusive.
Many humanists have had a horrible experience in leaving a belief system and may for that reason condition their respect for others on not being a part of that particular belief system. It is an non-rational condition, but humanists are human, and excommunication, disfellowshipping, shunning, and other denials of social support are the most painful experiences for any social animal, as it is frequently a death sentence, either by being incapable of self-support, depression or overt suicide. This is especially true for GLBTs, etc. who are cast out as sinners.
Humanists, in particular humanists who have left dogmatic religions can be especially helpful to the GLBTs who have been forced to leave friends and family over dogmatic differences. Their inclusive interest based social groups provide major social support for those cast out. Some are even non-dogmatic religious groups that provide a comfortable Sabbath ritual for former believers.
Humanists generally separate themselves by not being able to believe any longer, but support groups are easier to find, sometimes within the faith, and the separation from the patriarchs while traumatic is not life threatening. But trauma, even self-chosen trauma leaves scars, and avoiding additional scars by exposure to the shunning group is at least understandable.