Methane helps cool the planet. Methane has a much higher heat capacity than CO2, taking significantly more energy to heat up. Methane will leads to a reduction in global temperatures, which they don't want to happen to continue to feed their narrative.
Climate change is simple. The world goes through a period of heating, it evaporates the heavier water molecules at the poles, the moisture in the air requires a significant increase in energy to heat the world, and when the sun goes through its cooling phase, the temperatures radically drop. Moisture - water - has a significantly greater heat capacity compared to air, thus causing the cooling. This is then the cooling phase. This cycle repeats, and repeats, and repeats.
There is no climate apocalypse. It never existed.