Being used

"used to label people with beliefs that differ from our own?"

Well, Huw, one of the more irritating thing about Climate Activists is their love of labelling everyone who isn't convinced of the validity of their cause, as "Climate Deniers". That particular label is ascribed to us usually in a tone of prejudice and derision. They want us to hang our heads in shame, confess our faults, and promise to mend our ways. In that respect some of them are like religious fanatics on a holy quest. And just as irrational.

A good definition of Climate Activist may well be what you described, but the ones we see are definitely not as innocuous as that. People gluing their hands to the road, for god's sake! People who are rational enough and intelligent enough to become interested in scientific researches are not likely to publicly behave as ridiculously as that! No, the folks who glue themselves to the street and go around harassing their communities are not "Activists". They're just shallow people looking for Some Big Thing to latch onto for their own gratification. They make utter fools of themselves but they don't have the common sense to realise it.

the huge amounts of money spent to convince us otherwise.

I don't know what those huge amounts of money are, or who's spending them. Most communities are spending large amounts of money fixing the disruption and damage that "Activists" are causing with their "protest marches".

I think it's ironic that they loudly and stridently accuse governments of wilfully ignoring and overriding the demands of their citizenry, yet they seem to expect those same governments to enact rigorous but unrealistic legislation that will force their citizenry to abide by Laws, the necessity of which they're not convinced.

No, those young people are just the same as all previous young people - they're in that stage of wanting to feel like they're all grown up. They'll be very troublesome until they grow out of it.