Germanic lineage arrived from the east?

[Jaska]

What we can establish is that the Scandinavian Bronze Age Culture, beginning ca. 1500 BCE, is already related to the Germanic lineage.

Based on what linguistic evidence? That seems like wishful thinking especially given the close ties between the Nordic Bronze Age and Mycenaean Greece, Sintashta, Unetice...

If this were true, there would be Pre-Germanic loanwords all over Europe, not just in the Northeast.

Linguistic evidence has been presented earlier in this thread, but I repeat:

1. No conclusive linguistic evidence exists concerning the earliest Pre-Proto-Germanic stages: different studies put Germanic closest (taxonomically or contactwise) to different IE branches: Balto-Slavic, Italo-Celtic, Albanian, Tocharian…

2. Contacts with Celtic occur only ca. 1200 BCE in Southern Scandinavia, according to John Koch.

3. Contacts with West Uralic are more difficult to date precisely. Paleo-Germanic loanwords in Finnic and Saami could be just slightly earlier than Late Proto-Germanic, but they could also be clearly earlier (fork ca. 1000–500 BCE). The proposed older Pre-Proto-Germanic loanwords in West Uralic are still rather uncertain, as competing explanations have been proposed at least for some of such loanwords.

Scandinavian Bronze Age Culture began shortly before these contacts established between Germanic and both Celtic (in the west) and Finnic and Saami (in the east). This culture also spread quickly to the southwestern coast of Finland. These contacts would be very difficult to explain from some other place than from this cultural sphere - can you propose a better place?

What exactly would be wishful thinking here and why? The Unetice Culture is generally considered as one root for the Scandinavian Bronze Age Culture. But what connections you claim there are with Sintashta and Mycenae? 

By Pre-Germanic, do you mean Pre-Proto-Germanic or totally different language preceding Germanic? It would be good if you could explain what you mean by this and why do you think that there should be such loanwords all over Europe.