This is a strange claim indeed since T'hillim / Psalm 89 makes no mention whatsoever of Immanuel (which means "G-d is with us."
Line 28 (27 in Christian versions which tend to not number the first line, or not print it) is speaking of King David -- to whom G-d promised the eternal right of kingship of the Jews for him and his biological male descendants. If Jesus was a virgin birth then Jesus was not one of David's descendants (only the male can pass a tribal right on to his children, or to his wife upon marriage). The woman's tribe has nothing to do with passing on tribal lineage (she must be Jewish, but her birth tribe disappears upon marriage).
Line 28 must be read in context - it is clearly about King David.
T'hillim / Psalm 89:21-28 "I found David My servant, I anointed him with My holy oil. With whom My hand will be established, even My arm will strengthen him. No enemy will exact from him, neither will an unjust person afflict him. And I shall crush his adversaries from before him, and I shall strike his enemies. . . He will call to Me, 'You are my Father, my G-d, and the Rock of my salvation. I, too, shall make him a firstborn, the highest of the kings of the earth.'"
Read the next few lines and it is clearer that this is David and not Jesus "I will forever keep My kindness for him, and My covenant will remain true to him. And I shall make his seed endure forever, and his throne as the days of the heavens. If his sons forsake My Torah and do not walk in My judgments, If they profane My statutes and do not keep My commandments, I shall punish their transgression with a rod, and their iniquity with stripes. But I shall not cancel My kindness from him, and I shall not betray My faith. I shall not profane My covenant, neither shall I alter the utterance of My lips. One thing have I sworn by My holiness, that I will not fail David. His seed will be forever and his throne is like the sun before Me." T'hillim / Psalm 89:29-37.