I would say with greater confidence that he who is cruel cannot be a good man. It does not matter who or what the object of that cruelty is. Goodness of character certainly displays itself in the ability to be kind and connected with ALL beings, ALL living things, and ALL things. To neglect any aspect of one’s environs, whether living or not, shows a lack of respect, consideration, and responsibility.
I do believe that the one true religion is the one that embraces everyone with no judgement. It is the one that treats all humans equally and respects all humans. It does not discriminate and declare that any one person, group, or nation is any better than the rest. It seeks only unity and community, peace and love. It teaches only respect and compassion for everything and everyone around us. It encourages us to share what we have and give what we can freely, with no obligations. In this religion, there is no room for selfishness or greed, power or politics. In this religion, individuality is celebrated, not shunned. In this religion, an attack on anyone, in whatever form, for whatever reason, is a breach of trust, a war against peace, a violation of the individual. I have my faults and failings, but I try to live my life this way, as much as I can, in whatever way I can.