I do not believe there is a perfect, all-inclusive definition of Wicca. Many variations, interpretation and practices within the Wicca label exists. They are all correct and accurate for that particular practitioner. However, I find the following to be the closest explanation of the basis for Wicca.
Wicca is a very peaceful, harmonious and balanced way of life which promotes oneness with the divine and all which exists. Wicca is a deep appreciation and awe in watching the sunrise or sunset, the forest in the light of a glowing moon, a meadow enchanted by the first light of day. It is the morning dew on the petals of a beautiful flower, the gentle caress of a warm summer breeze upon your skin, or the warmth of the summer sun on your face. Wicca is the fall of colorful autumn leaves, and the softness of winter snow. It is light, and shadow and all that lies in between. It is the song of the birds and other creatures of the wild. It is being in the presence of Mother Earths nature and being humbled in reverence. To be Wiccan is to be a healer, a teacher, a seeker, a giver, and a protector of all things. (The Celtic Connection) The Goddess and God are present in all of us, making us all "one", equals at the core (see http://liomsaland.blogspot.com/2015/10/we-are-all-one.html). Our Deities are non-judgemental, leaving the ultimate judgement up to us individually as we plan our life's path before entering our next lifetime in the circle of life.
If none of this resonates with you, please stop reading as the remainder of my points will be moot.
During my interactions with Wiccans and others, Pagans, Christians and all other religious followers, either on-line or in person, I have witnessed surprising and troubling (to me) displays of attitudes and behaviors, intentional and non-intentional, that causes me to review my beliefs and acts and question if they are compatible with the Wiccan belief system.
Racism is the belief that all members of each race possess characteristics or abilities specific to that race, especially so as to distinguish it as inferior or superior to another race or races. Prejudice is discrimination, or antagonism directed against someone of based on the belief that one is superior.
Racism, as intolerable as it is, is not, however the only form of prejudice. Examples are too exhaustive to list, but includes sexual preferences, religious beliefs, disabilities, political affiliations, economic status, etc. Standing idly by witnessing such activity is no better than the physically active abuser.
We are products of our past, experiences and environments. Parents, relatives, older neighbors, friends, athletes, politicians, role-models, etc., all leave marks, positive or negative, on our psyche and how we view others and the world we encounter. Not knowing our fellow human's chart or past experiences leaves us (or should leave us) in a non-judgemental position.
While society norms have changed over the past numerous decades it appears that a number of individuals haven't kept pace. This is true with respect to the public in general, not just Wiccans. However, given the basis of Wicca (see paragraph 1) how does any practice of racism and/or prejudice co-exist with this religious dogma?
Current events have brought the closeted topic of racism and prejudice to the forefront and allows us the opportunity to do some honest self-examinations. How do you grade yourself? Are some changes or adjustments needed? You be the judge, for you alone know the real truth and are the one who looks in the mirror each morning. Do you see what others see?
There is a difference between knowing the path and walking the path.