It’s not hard to see what core elements of liberalism cannot be removed - you can’t take LGBT, feminism, abortion, out of the party plank and still be liberal.
It’s a lot harder to pin down conservatism. For instance, I don’t see any reason why a conservative leader or party couldn’t raise taxes on the rich and still be conservative - saying “raising taxes on the rich helps us indirectly reduce our budget deficit” would be totally conservative. No reason why conservatives couldn’t embrace universal healthcare - “It’s a lot more efficient, reduces bloat, and reduces cost” - that’s totally conservative.
No reason why conservatives can’t support Ukraine; indeed, up to as recently as a decade ago, conservatives were the more hawkish, anti-Russia party. No reason why a conservative couldn’t support abortion - they could even come up with a very racist rationale or something, “Abortion largely suppresses black people since black people get the most abortions, so let’s be pro-choice and keep their population squelched!” - something like that.
No reason why conservatives couldn’t take action against climate change - “This is expensive if we don’t fix it quickly - it’s cheaper to address global warming now rather than later; a stitch in time saves nine.”
No reason why conservatives couldn’t cut military spending - “we need to trim governmental spending and we’re doing $800 billion a year for the Pentagon already, time to cut down.”
No reason why conservatives couldn’t support amnesty for illegal immigration or a more pro-immigration stance; again, they could easily come up with some nasty racist rationale; “those low-paid brown-skinned people are who pick the strawberries, just look at what happened to Florida when those migrant workers weren’t there.”
On virtually any policy, you can invent some flexible conservative rationale as to why the right wing could or should support it.
So - when all is said or done, what elements of conservatism can NOT be taken away? What’s the irreducible core of conservatism? Guns?