If the question is a bit confusing, what I'm asking is if there is scientific evidence to the contrary to two arguments against climate change.

The first one is something I heard from someone that I had talked to a while ago. He said that climate change is not a serious issue due to the "globe" having warmed up before in humanities existence, namely the Greenland during the Viking age. Or the Nordic countries.

The other is a webpage that I stumbled upon that states that extreme weather is decreasing.

What I'm wondering is if there is scientific evidence that run contrary to both of these counter arguments.

Addendum. I understand that these two arguments against climate change are not factually correct. However, in the spirit of the scientific method I went to look for evidence that pointed either in favor or against these arguments... only to then wade through a quagmire of pseudo science and nonsensical claims in favor of these arguments which are distressingly common. Thus I ask this question.