The US was founded on the concept of self (but limited) government, individual rights and Judeo-Christian values; the principles, including the rule of law (a legal system based on statute law, meaning there has to be a law forbidding or commanding an action for the action to be illegal) which are the founding principles of our Constitution and Bill of Rights (prior to Democrats appropriating the term it was called a liberal worldview). This is what MAGA (or traditional liberals) will not compromise on. As Barry Goldwater said "Extremism in defense of liberty is no vice. Moderation in pursuit of justice is no virtue.”
MAGA ideals realize you can't have a stable society without a common culture and in America our common culture is based on our Constitution (the reality is both WWl and certainly WWll were a result of uncontrolled immigration and a lack of assimilation in Europe, and nothing apparently has changed). Europe does not have a Constitution or Bill of Rights, so they have "allowed" speech, not protected free speech. Further the European legal system has degraded so they now have a system of men, not laws (the opposite of equal protection) based on Post Modernism and the fear of being branded a racist. It also has made no sense that we allow equal trade with countries with a much lower standard of living and non- reciprocal tariffs (for some reason other countries can have tariffs on US goods, but the US is not allowed to do the same); these type of trade agreements is what Ross Perot called the Giant sucking sound, as American manufacturing has left the US to countries were manufacturing can be done cheaper. Trump doesn't really think tariffs are a good thing at all, but they are bargaining chips to bring American manufacturing back to America. Since WWll, the US has subsidized the Western world, as world economies were made interdependent as a strategy against future worlds wars, but this system has become too draining on US resources as other countries have contributed less and less, made even more vulnerable as they starve themselves of energy under the auspicious of the Net Zero fallacy.
Finally the idea MAGA has some affection towards Putin, ignores 75 years of the Left in the US, apologetics of the USSR and later Putin's Russia; I guess those that make such a claim forgets President Obama literally handed Crimea to Putin, breaking his promise to defend Ukraine from Russia if they disarmed. The fact is Russia was the darling of the Left, up until the time Trump became President and the lie of Trump Collusion and TDS was created. Trump speaks glowingly of Putin because he wants to make a deal with him, but he also bombed Russian soldiers in Syria during his first administration, and has threatened new and renewed sanctions, if Putin walks away from negotiations to end the Ukraine war.
Is there an ideology, hell yes. It's called America first, recognizing American exceptionalism and Making America Great Again and this is done by mitigating waste of tax dollars and corruption, bringing manufacturing jobs back to America, end starving the country of energy, ending the anti science, anti biology, anti parent, anti child, anti women trans lunacy, controlling the borders and immigration, building back our military, end the institutional racism that has infected the country through DEI, end the antisemitism that is rampant in colleges and universities and make elections secure, hopefully by returning to paper ballots and in person voting, where mail in voting is the extreme exception and ballot harvesting is not allowed.