The ways in which God is worshipped have undergone profound transformations throughout biblical history. Practices that were once cherished and acceptable can later become entirely rejected. A central example of this shift is the transition from the worship style of the Patriarchs to the strict framework established after the giving of the Torah and the entry into the Land of Israel. The primary approach among commentators is that a pillar is a single large stone used as a focal point for gathering, offering sacrifices, pouring oil, or serving as a platform for priests [רש״י, רמב״ן, שטיינזלץ, רלב״ג]. In contrast, an altar is a structure built from earth or multiple stones. Erecting a pillar for worship is absolutely forbidden, even if the builder's intentions are entirely pure and directed toward Heaven [רש״י, רשב״ם, אבן עזרא].
This strict prohibition, however, is limited exclusively to a ritual context. Setting up a pillar to honor the dead, much like Jacob did for Rachel, or as a simple monument to remember an event, is completely permissible [בכור שור, פענח רזא]. Beneath the surface of the physical structure, the prohibition also hints at a ban on offering animals that have been associated with idolatry, such as those that were worshipped or set aside for foreign rituals [קיצור בעל הטורים].
The sudden divine rejection of the pillar marks a sharp turning point. During the era of the Patriarchs, the pillar was a beloved and desired form of worship. Yet, it became something God hates because the Canaanites adopted it as a permanent, central fixture in their idolatrous practices [רש״י, מלבי״ם, שפתי חכמים]. Naturally, attributing human concepts of time or emotions like hatred to God is purely metaphorical [ברכת אשר על התורה]. In a spiritual sense, this hatred signifies that erecting a pillar for worship defiles the sanctuary, desecrates His name, drives away the Divine Presence, and ultimately leads to exile and destruction [אדרת אליהו].
A deeper conceptual approach views the shift from the single stone pillar to the multi-stone altar as a reflection of a fundamental change that occurred when the Torah was given. A pillar, consisting of one natural stone, represents a passive recognition of God's work in nature and history. An altar, on the other hand, is a human creation built from multiple parts, symbolizing moral submission and the dedication of human actions to divine law. Following the giving of the Torah, God no longer desires merely the passive acknowledgment of His greatness in nature; instead, He demands the active fulfillment of His commandments and the submission of human will [רש״ר הירש].
This raises a compelling question regarding why the pillar is forbidden on the grounds that it is a Canaanite practice, while the construction of an altar is commanded, given that the Canaanites used altars in their worship as well. Commentators offer several perspectives that weave together to resolve this issue. The primary approach among commentators notes a difference in how these structures were used. While the Canaanites used altars only occasionally, the pillar was an absolute requirement, and no idolatrous temple existed without one at its entrance [רמב״ן, מזרחי, הטור הארוך]. Furthermore, an altar is a universal tool used by all people for sacrifice, whereas the pillar was a specific form of worship institutionalized by the Canaanites [גור אריה]. Their functions also differed, as an altar was solely for sacrifice, while a pillar was often worshipped directly or used as a base to hold an idol [העמק דבר, ביאור יש״ר]. Additionally, because God explicitly commanded the construction of an altar, building one is not an imitation of foreign nations. In contrast, since there is no command to build a pillar, doing so appears as though one is following foreign customs [משכיל לדוד]. Finally, precisely because the pillar was so cherished by God during the time of the Patriarchs, He is much stricter about it now. Once the surrounding nations took something so deeply significant and defiled it for idolatry, it had to be forbidden completely [דברי דוד].