Christians are obligated to tell the truth. And if someone deliberately, crudely, blasphemes, then a Christian must operate under the presumption that such a person is not in a state of grace, that such a person is a "son" of Satan.
That does not mean that Mr. Vega is beyond hope. But it is our obligation to urge him to "repent and believe," not make excuses for him.
Well, I would agree with you there. But do you really think calling him the spawn of Satan is the way to "urge him to repent and believe?"