Hadassah?.. lol.. she's been my nemesis since I came out as pro-poly. Netherlands has been an interesting European battleground. ( https://natsab.com/biblical-marriage/ )Yesterday I visited a website of a dutch (Messianic) congregation and found an article about marriage and there the question was raised as well why poly was abandoned. Answer from one of the more well-know teachers was also referring to the same arguments that it was very, very clear that it was not biblical to do poly ("therefore a man...", the one-flesh arguments and the requirements for elders came along)...
Thinking about disassembling an article she sent me to point out the multiple logical and Scriptural fallacies. Already sent a four page email response to one US messianic teacher that was spewing falsehood.