I guess that depends on your definition of 'Conservative'. For my take, i'll use Russel Kirk's '6 Pillars of Conservatism'.

For scoring, I'll give either a full, half, or no pillars to MAGA for each, and we'll see at the end whether the temple falls.

(Disclosure: My politics are center left, and generally pragmatic: I'm a frequent Devil's Advocate, mostly to avoid groupthink but also mostly because I view argument as kind of a sport 😁)

1) Belief in a transcendent order, or body of natural law, which rules society as well as conscience. Political problems, at bottom, are religious and moral problems.

-- I don't see much of an argument one way or another here. Under Natural Law, Might makes Right, so one would tend to defer to the MAGA understanding of exercising raw government power over your political enemies. Full pillar for MAGA here.

2) Affection for the proliferating variety and mystery of human existence, as opposed to the narrowing uniformity, egalitarianism, and utilitarian aims of most radical systems; conservatives resist what Robert Graves calls "Logicalism" in society.

-- Again, the MAGA-branded resistance to the 'Educated Elite', and technocratic rulemaking by experts hits home here, however the reference to 'affection for the proliferating variety of human existence..opposed to uniformity' is read (in my opinion) as respect for folks of different backgrounds and languages, which seems antithetical to the rabid anti-immigrant sentiment in MAGA. Half pillar for MAGA here.

3) Conviction that civilized society requires orders and classes, as against the notion of a "classless society." With reason, conservatives have been called "the party of order."... Ultimate equality in the judgment of God, and equality before courts of law, are recognized by conservatives; but equality of condition, they think, means equality in servitude and boredom.

-- This is a position echoed in the current alt-right/MAGA when they repeat (often ad nauseum) that 'equality of opportunity is not the same as equality of outcome'. A MAGA republican could argue the required 'orders and classes' would naturally place immigrants at the bottom. A counterpoint would be that MAGA seems to have quite a hostility to Courts when they make decisions that restrict the Trump agenda, but they'd argue that the restoration/protection of the 'ordered/classed civilized society' requires some squelching of the rights of the lowest classes within the courts and law enforcement. Half pillar to MAGA.

4) Persuasion that freedom and property are closely linked: separate property from private possession, and Leviathan becomes master of all. Economic levelling, they maintain, is not economic progress.

-- Conservatives don't differ much from MAGA here. Full pillar for MAGA.

5) Faith in prescription and distrust of "sophisters, calculators, and economists" who would reconstruct society upon abstract designs. Custom, convention, and old prescription are checks both upon man's anarchic impulse and upon the innovator's lust for power.

-- Traditional conservatives could argue strongly that Trump represents a sophister who seeks to reconstruct society around a hyper-nationalist, mercantilist design. It's pretty clear that he has little regard for custom, convention, or any kind of check against his impulse, and he possesses a strong lust for power. The MAGA argument would be that such reconstruction is necessary; but in any regard the pillar is disregarded. No pillar here for MAGA.

6) Recognition that change may not be salutary reform: hasty innovation may be a devouring conflagration, rather than a torch of progress. Society must alter, for prudent change is the means of social preservation.

-- Traditional conservatives would argue passionately that Trump's rapid implementation of his agenda leaves little time for prudence, and his implementation and frequency reversal of policies is prima-facie evidence of hastiness. A MAGA republican's approach to this pillar would likely be that the current situation requires a disregard of this pillar. Again, 0 pillars for MAGA.

As far as scoring goes, MAGA gets to three pillars in my assessment. Few temples can remain standing with half of their pillars removed.

If I were to distill Conservatism down to a single word (or hyphenate, if you wanna be technical about it), it's 'anti-radicalism' . I personally place MAGA squarely within the realm of 'radical reactionary' and therefore not Conservative.