Sounds like you're one of the rare people who actually understands what judicial activism really means.
Sounds like you're not.
First, is judicial activism always bad? Was it judicial activism when Warren fought to rally all the other justices to overturn Plessy v. Ferguson and end legal segregation?
Yes, it was, and it was a good thing to overturn bad law.
The issue isn't 'activisim'. It's doing well at interpreting the constitution.
The right is terrified of someone inventing things the constitution doesn't say. But they're blind to the ways the constitution is INTENDED to have some broad rights protected for things that might not even exist yet in broad principles. The constitution's guarantees of equality can include things like protection for gays from discimination under the law based on modern advancements and understandnigs that weren't feasible earlier.
Indeed, the right who demand 'strict' interpretation that is more strict than the constitution says they should have are EVERY BIT OR MORE bad interpreters and 'activists' and 'enemies of the constitution' as those who find too many new 'rights'. They, for example, can be guilty of ignoring the 9th and 10th amendments to the constitution when it comes to the protection of any of those 'rights reserved to the states and the people' they disagree with.
Those are broad amendments put their for a reason - and are not ONLY for the use of the right when they don't like something the federal government does.
If you understood judicial activism, you would understand it can be too broad OR too narrow, and it's all 'activism'.
The current right-wing justices, who all promised to be very limited in overturning precedent, have been some of the most aggressive justices at overturning it.
But you don't count them as activitsts, presumably, only 'liberals'.
The most prominent issue of 'activism' the right complains about might be the recognition of the right to privacy. And yet, the 'liberal' justices are right who protect it.
Putting Roe v. Wade to the side for a moment, it rested on the decision to protect the right of citizens to get birth control pills. Some 'socially conservative' states didn't like the social changes such pills would bring, and outlawed them. The liberals made the very valid point why the constitution, while not spelling out protection for such a thing for the citizens, had a broad spirit of freedom to it that limited the government from interfering in citizens' choices this way without some public policiy justification.
If you respect the constitution, IMO, you agree with them. If you have your own desires what you want it to say and are willing to put those over what it actually says, you are a 'judicial activist' in the worst sense of the word, of the right. Again and again this has happened - there's nothing in the constitution about Miranda rights and publically provided attorneys for poor defendants - these are 'judicial activism' that PROTECTED the intent of the constitution's spirit to actualy make the justice it called for practical.
They understood how something like a constitutional right - say, the right not to answer police - could be made into a non-right if the police could tell the suspect he had no such right even though he did. They were PROTECTING the constitution with this measure - which was the right thing to do despite its vulnerabilit for some to pander to voters to attack the justices 'putting the rights of the criminal over the victim' to gte elected.
'Judicial activism' is not a good or bad thing - interpreting the constitution well is the issue.
But to the definition that it means interpreting the consitution poorly to say it means something it doesn't, that's equally the case whether it's finding something that's not there or ignoring something that is, including the constitution's intentional broad principles.
Saying the constitution is narrower than it is is a bad judicial activism that most who use the phrase are guilty of and don't understand.
One other comment - it has to be said that this is not a black and white issue, that the constitution is a short enough document that there willl bi issues the justices have nothing more than the princuples or spirit of the constitution to follow, and they can go either way, where the issues are not ones for the legislature.
The right often likes to inaccurately pretend that everything they complain about is some clear issue settled by the document. It's not.
Brown v. Board of Education, for example, addressed an issue which an earlier court saw one way, but a later one saw differently. Where are you going to find the constitution say whether segregation was ok or not? The question was, did the constitution have a broadly implied right to equality that was violeted by 'separate but equal', or did it not?
There were those who said separate but equal did meet the constitutional requirement for equality under the law, and others said that 'separate but equal' was "inherently unequal". The latter were the 'liberals' who were following the 'sprit of the constitution' to note where the theoretical 'separate but equal' was not meeting that spirit and 'invented' the right of the minority to not be subject to it even if the government and the majority of the people wanted it. You don't find black and white (no pun intended) language in the constitution to say who was the 'judicial activist' ignoring the constitution.
In this case, most agree the justices who said 'separate but equal' was ok and ignored the practical effects on the principle the constitution has are the ones who were ignoring the constitution and the 'activists' who found more rights were right and correctly following the constitution. But don't pretend the people who prefer 'narrow' interpretations are backed up by the document.
Ignoring a broad principle in the constitution is every bit as violating of it as claiming things are there that aren't.