Is Germanic a subgroup of the Iranian languages?

I mean that it is characteristically of the spread of Indo-Europeans what you can't get is that the IE tribes that became to be known as Germanic first spoke a dialect of PIE. All Indo-European tribes could more or less understand each other for a long time. What we call Germanic in the sence of speakers of Proto-Germanic is am or less reconstruction of the late language speaking of IE speakers in Scandinavia when Grimms law and Verners law was fully evolved. The roman empire mostly got contact with Western Germanic speakers those who moved to the south because of climate change and it became colder and cultural down recession happened for the North-Germanic and also many deaths. It was not anthill the Viking Age more or less thill the north-Germanic culture got back up on it's feet.

Early IE cultural in Scandinavia was characteristic of the type Tumulus or Kurgans that you would find from the Corded Ware(If you would argue on the thesis that they where IE as it is most commonly taught) culture of IE dialects. They where characteristically according to wikipedia.

''Inhumation under flat ground or below small tumuli in a flexed position; On the continent males lay on their right side, females on the left, with the faces of both oriented to the south. However, in Sweden and also parts of northern Poland the graves were oriented north-south, men lay on their left side and women on the right side - both facing east. Originally, there was probably a wooden construction, since the graves are often positioned in a line. This is in contrast with practices in Denmark where the dead were buried below small mounds with a vertical stratigraphy: the oldest below the ground, the second above this grave, and occasionally even a third burial above those. Other types of burials are the niche-graves of Poland. Grave goods for men typically included a stone battle-axe. Pottery in the shape of beakers and other types are the most common burial gifts, generally speaking. Often decorated with cord, but also incisions and other types of impressions.