Gubbish, there are several more reasons (BTW, the one you cited was given by Rav Meir Simcha of Dvinsk, who was an ardent supporter of Zionism) why we are not choshesh to the thre oaths:
1. It is aggada not halacha and, in fact, does not appear in any of the major halachic codes.
2. The Goyim violated their part of the bargain – not to persecute us “too much” – on several occasions. Thus if there was a deal it is off.
3. The oaths were only for a limited period. Some say 1,000 years (if they started with the destruction of the Bayit Sheni that would be approximately the beginning of the Crusades – which were the first major violation by the Goyim). In nay case, the wondrous success of Zioinism shows that Hashem has released us from them and the time has come.