The Practice of Giving: How to Practice Giving "Thusly"?
Does anyone have any advice in how to practice giving thusly?


I think one needs to closely analyze the meaning of "thusly". It's valid to think of it as practicing charity with a serene, equanimous, AND wise mind. It doesn't mean one just carelessly gives to everyone, even if that means giving to evil people so that they'll have the means to carry on with their evil way. Remember the merits of giving is proportional to not only the mind state of the giver, but also that of the receiver:


  [The Buddha:] "I tell you, Vaccha, even if a person throws the rinsings of a bowl or a cup into a village pool or pond, thinking, 'May whatever animals live here feed on this,' that would be a source of merit, to say nothing of what is given to human beings. But I do say that what is given to a virtuous person is of great fruit, and not so much what is given to an unvirtuous person. And the virtuous person has abandoned five factors and is endowed with five". ~~ AN 3.57 ~~