I don't think anybody would call this world utopic, liberation from utopia wouldn't make much sense.
I never said this world is utopic and what is this idea of liberation? Liberation from what to where?
What can "easily" happen in this world is that there is a paradigm shift from self-centred greed and profit at all costs (with small pockets of selfless generosity and mutual aid) to a global system of selfless generosity and mutual aid (with small pockets of self-centred greed and profit at all costs). There have been, and are, countless examples of these types of society. This is not a utopian vision (which presupposes perfection) this is a workable ( in the "real" world) hypothesis.
As to your other point: if you wish to myopically focus on a small number of tantric texts that (metaphorically in most cases) graphically depict the use of violence and violent means in order for you to justify/condone the use of violence, well, what can I say...? Go for it?
Or maybe find a teacher to explain them to you? Because that "wealth of witchcraft, substances, and magical material within tantric practice..." is not ignored at all by Buddhists, it just isn't utilised in order to fortify the sense of self (like in witchcraft), it is used to assist in Buddhist practice.
They aren't a small number of texts, in fact the the kriya tantras, the first tantras had no soteriological trans-signification, these were primarily concerned with worldly siddhis, the soteriological trans-signification came in the higher tantras but the root texts of these are also devoted to a great extent to worldly siddhis as well, our sadhanas don't resemble the root tantras much. As for metaphorical views of these I'm sorry but tons of them are just obvious low magic, many can be viewed metaphorically, many cannot i.m.o. Of course the craft is used for " self ", so is going to work and paying the bills, so is eating, breathing, it's also for benefit and healing for others, realations with the natural world and unseen beings in it, elements, etc. this is simply external practice, it will not liberate one. I have had this explained by my teacher and given cycles with some of their external practices. I.m.o. it is not largely ignored but completely ignored within the community, it is a no no to even bring it up, when it is brought up it is just disregarded, people believe and hear what they want to. I don't feel I have to defend anything here because this issue is so blatantly obvious to anybody who takes a peek into such texts, I just have always found it funny how it is ignored.
Still the question remains regarding some hypocrisy, as well as a moral dilemma........there are tons of violent rites in the tantras, my teacher said this is resolved because though there is witchcraft in the tantras we are Buddhist witches ( tongue in cheek ) and so our motivation must always be white regardless if the practice is red or black. Of course ones own karma is ones own karma and with power comes responsibility, I guess it's just a fork in the road where one has to make ones own decision on the matter and accept responsibility wichever way one proceeds, but one would do well to look into our preconceptions of yogis throughout history and our ideas of them as "saints " etc. because certainly they have not all been what we would consider " saintly " people all in white, quite the opposite in many cases, if many hindu sadhus / yogins are known for this certainly there have been many " dark " tantric Buddhist sadhus in history, and they didn't have to look elsewhere for their practices.