If pressed, I think LogicWings would say that he's talking about compulsory altruism -- such as that which is inherent in the welfare state. Voluntary benevolent acts are no problem, and many make a great deal of sense.
First, self interest is not automatically identical with selfishness. Self interest can and must include maintenance of the community in which one lives, just as housecleaning, though work, improves our level of comfort.
Same issue as above. I might voluntarily give to support a school, or to establish a scholarship. One might give to suport medical research. Again, no problem. But when I'm taxed (forced altruism) to support welfare queens, I'm the victim of evil -- no other way to look at it. Also, while I'm on the topic of "voluntary" benevolence, if I've been brainwashed into believing that it's my duty to ignore my own needs so I can support welfare queens, I've been the victim of kooks.
Second, self interest is subjective, and many people enjoy being altruistic. Christianity seeks to foster this in people in whom this motive is latent.
Once more, voluntary benevolence is fine with me. But there are some people who interpret scripture to support hatred of wealth. There have been "bible communists" throughout history, including the Mayflower passangers (who, to their great credit, had the good sense to abandon it after their first disastrous year).