The basics about the greenhouse effect are relatively easy - however the details, when it comes to saying on how much the temperature will rise is really difficult. Thus with the basics, there is usually consensus, but with the details there is still quite a controversy. The point that AGW "skeptics" are currently promoting is that humans are not the cause for warming - is kind of last resort. Before they claimed it was not even getting warmer, but ignoring facts is getting harder here. Especially the version of putting doubt to the source of the CO2 is kind of dump - not even a Donald Trump would buy this. The measured CO2 increase and coal / oil usage match reasonably well - here consensus should be more like 99.x % - with the rest not knowing about maths, getting paid for (or for a personal interest) making up fake news or just follow there favorite guru like a religion without thinking.
As the topic is influencing our live, even if it is by politics spending some money on it or setting regulations, essentially anybody has a kind of opinion of AGW. However taking the consequences of AGW serious is a rather inconvenient truth: it would mean we should really cut down on CO2 releases and this would likely mean cutting down on our standard of living, though not directly as much as the reduction in emissions. The reductions currently proposed are no way enough. It is just a first step - a sustainable level would be more like < 1% of current levels.
So we tend to ignore it, as long if we see the slightest chance that it might not end up as bad as the experts tell us. As climate is reacting slow - it would be more like our children or grandchildren that would pay the price. Even if the warming would stop due to no more new CO2, something like melting of the ice in Greenland and rising sea-level would continue for maybe a century. With other pollution and use of resources we tend to do the same. So this pattern is not specific to AGW, it is more like typical human.
However there is some hope: Changing the economy to lower emissions is currently expensive for those who go ahead, but in the long run it may mean that they have the technology and patents for the future. So there might be a long term plan behind China dominating the market for solar modules, even if the are loosing some money on it now. Being late in the change may also mean becoming an underdeveloped country in the future.
A tipping point for accepting AGW might be when the markets realize that is might not be a good idea to do long term investments in areas less than about 5 m above see level. So it is expected that at some time in the future housing prices in low lying cities like NewYork will collapse, once the flooding is accepted.