Did Protestantism strengthen German as a political unit?

A question I cannot find in my book, please help Thanks!

anything that gets large groups of people to blindly and without thinking follow and stay in line, like religion, is always gonna strengthen a political unit... you dint have to spend time explaining to the people why or what you are doing, just saying you are doing it for god and its away easier

Not really. 16Th and 17Th century settlements of religious conflict in the Holy Roman Empire basically followed the principle that the ruler of a sub-territory got to decide the religion of his sub-territory, which only contributed to the political fracturing and instability of the HRE. Much chaos ensued (see, for example, the 30 Years War).

The 30 Years' War says no.