Maybe there would be less anti-American machinations in this country if we required all citizens and immigrant and visa applicants to periodically sign an oath of allegiance.
Naturalization Oath of Allegiance to the United States of America
"I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty, of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by the law; that I will perform noncombatant service in the Armed Forces of the United States when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely, without any mental reservation or purpose of evasion; so help me God."
uscis.gov/us-citizenship/naturalization-test/naturalization-oath-allegiance-united-states-america
This is the Oath of Office for Members of Congress.
“I, (name of Member), do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God” (5 U.S.C. §3331).
clerk.house.gov/member_info/memberfaq.aspx
But members of Congress do not have to disclose dual citizenships, so they can keep their divided loyalties secret.
thehill.com/blogs/congress-blog/homeland-security/240572-when-dual-citizenship-becomes-conflict-of-interest
It is thought that American-Israeli citizenship is the most frequent for Members of Congress.
Since 2010, Israel has required an oath of loyalty for would-be Israeli citizens to "pledge allegiance to Israel as a Jewish and democratic state".
A spokesman for the US embassy in Israel in 2010 said the oath would not affect US citizenship–not because there is no conflict in citizen loyalty to two different countries–but because-wait-for-it
“US citizenship, in general, in order for it to be lost, something fairly strong has to happen like renunciation,” he explained. “So it’s really hard to accidentally lose American citizenship, with the exception of treason or working for a foreign government and those sorts of things."
jpost.com/Israel/Oath-wouldnt-require-Americans-to-drop-citizenship
So dual citizenship may conflict with American interests and principles, but that doesn't matter because America is lax in requiring loyalty to our country.
Unfortunately, we can be certain the dual citizenship members of Congress will block any legislation that would require single citizenship and a loyalty oath for all citizens, not just naturalized immigrants.