I am sure you mean Human Caused climate change,
but for the sake of argument, why would such an opinion about a such a subjective topic be counted as a lie?
Consider that the
IPCC AR6 SPM says,
and 1000 GtCO2 is about 127 ppm of increase, a little less than the 135 observed increase in CO2.
If we look at the warming that doubling the CO2 level (280 ppm), then the IPCC's numbers would place it at a range of between .6C and 1.38C,
with a best estimate of .99C. That .99C would be spread over 160 years, and would look like warming we have all been experiencing for our entire lives.
Add to that, the observed warming is mostly in the winter and evening lows, and yes, it would be a honest opinion to say it is nothing to worry about.