Are humans interfering with or a part of evolution happening today?

Yes, it is likely that human are interfering with their own evolution and the evolution of other animals. Over the last few centuries we have modified our diet, our exercise habits and our habitat, all of which influence our genetic makeup. On a larger scale we have developed social systems to help cater for those who would otherwise have perished in a more ruthless, selfish society. We operate on new born babies with heart defects to keep them alive, which in turn allows the genes for heart defects to remain in the gene pool. Those who would otherwise find it difficult to survive are kept alive, feed and educated at the expense of the progress of the "superfit" who don't need complex support networkd, but ultimately this creates a better society for all, and one that should be maintained. History has shown us the alternatives, those like the Spartans, simply cannot be maintained.