Remember covenant acts from Abraham to exodus: Covenant with the ancestors

The covenant is remembered as word, oath, and land promised to a few strangers

He is the LORD our God: his judgments are in all the earth. He hath remembered his covenant for ever, the word which he commanded to a thousand generations; which covenant he made with Abraham, and his oath unto Isaac; and confirmed the same unto Jacob for a law, and to Israel for an everlasting covenant: saying, Unto thee will I give the land of Canaan, the lot of your inheritance.

Abraham, Isaac, Jacob, and Israel are the named partners. Land of Canaan is the covenant's spoken lot in this retelling. The psalm is worship of a remembered gift, not a complete chronology and not a title deed for modern political violence.

Fewness, wandering, and a warning not to harm anointed servants

When they were but a few men in number; yea, very few, and strangers in it; when they went from one nation to another, from one kingdom to another people; he suffered no man to do them wrong: yea, he reproved kings for their sakes; saying, Touch not mine anointed, and do my prophets no harm.

The ancestors are few, strange, and moving. Protection is God's, including reproof of kings. Anointed and prophets in this stanza are those wandering servants, not a modern pastor, candidate, or nation claiming immunity from critique. Touch not is not a shield for abuse.