Conservativism is, and always has been, exactly the same. There are no objectively conservative values. Conservativism is defined by first defining the Self, and then drawing a circle around the Self to identify the policies and positions most important to the self. These policies and positions are negotiable at any time, and anything done or said by a conservative that benefits the Self is good. Anything said or done by the Other in opposition to the Self is bad. This includes taking any policy position that doesn't necessarily help the Self directly, but does not hurt the Self and drives voters or donors to support the Self.
There has never been a Conservative for whom these guidelines did not apply. Not one. They dress their views in stoicism or austerity or nationalism or xenophobia or bigotry, but they are always at their core a form of malignant narcissism. That's why Conservatives get abortions, raise taxes, support immigration, support government handouts, increase government spending, promote federal power, or find themselves on the progressive side of any particular issue when it is good for them.
It's how they can lie or cheat or steal or kill, and claim to occupy the moral high ground. They commit these sins in the name of the Self, and the Self is good, so their actions are good. When the Other does those same things tomorrow, they are evil because the Other is evil because they are not the Self.
That's it. There's no additional logic, no metrics or thresholds or tolerance or foundational beliefs. Just Me.
It has always been thus.