exactly because of that. If you love him stop him from doing madness. For he would regret later. Poles are Sarmats (Slavs). Still. You English (as all Europeans) are ultimately of Sarmatian origin. But, English and many others, at one point of history, cut the continuity with their original Sarmatian culture, due to all kind of reasons. Poles didn`t. See, that is worth to be saved. Its precious. Its so precious.
Take the Bible away from him, maybe he gets his ridicilous ideas from there.
What a ridiculous thing to say, maybe you should start reading it so you don't sound so ridiculous.
What if he picks a name I can't pronounce
Most proper Polish names are always shortened by a nickname that you can make up to your liking. Like my proper name is Sir Johnathan Magic Rebel however everyone just calls me "Reb".
Name your kid Michał if that is a boy, not Michael mind you, its a silly name. More fitting for a girl. If that is a girl call her Michelle, now that is a nice name.
Because strictness is a feature of personality, not national trait.
On the other hand, if by being strict you mean being some kind of traditionalist, then nationality may have a slight impact. But there is no rule about what kind of fathers Polish men are.
It's probably personality as he has views on what food we have, what to do etc and he doesn't speak much English so I have to translate it all on my phone.