The argument "for/against" global warming isn't the proper way to ask the question. The FCCC (part of the UN) defined global warming as man made. So if you think there is warming, but the cause is from the sun, then by definition, you don't believe in "global warming".
Over short periods of time, it is reasonable to say the climate is getting warmer. There is no such thing as a static climate.
But what is the cause? Some think that co2 causes warming, man produces co2, therefore, all warming is caused by man.
Some find this overly simplistic. If co2 causes warming, then how much warmer would it be if co2 concentrations doubled? No one can tell you. There is no relationship.
Many other factors contribute to the energy of the climate. The largest influence is the Sun. The Sun's output has changes 0.1% in the last 100 years. Co2 has gone from 280ppm to 360ppm, or a 80ppm increase, or just a scant 0.008% increase. The Sun's output increased more than 100 times the rise of co2. What is reasonable to conclude?