Shalom Christian!
I very much agree with your concerns... and share those concerns... which is largely why I haven't jumped onboard with efforts like Kol-Hator, Worldwide Biblical Zionists, or HaYovel. If people believe the Ruakh of our Father leading them to join those... to reconcile with and help Jew-dah... then by all means, they should be obedient. There likely is and will be a remnant of Ephraim that joins Jew-dah before Messiah whistles for the larger remnant... but personally... I don't YET feel or hear that calling to return to the Land. My purpose is largely directed at waking Ephraim up as the times of Trouble increase. Jew-dah is largely not my audience or my concern at this stage.
However, the whistle may come soon! A call of restoration will precede the coming of Messiah... which will be accomplished by Elijah/Eliyahu... who is a PERSON, not just a "spirit" belonging to Eliyahu (Malachi 4:5). Even so, I'm not certain if part of that restoration will be the joining of Ephraim and Jew-dah. Maybe it will be... Eliyahu was originally a prophet primarily directed at the Northern Kingdom. =)
Keeping both eyes open!
Hanok



