What you're saying makes sense.
Some Americans, regardless of political affiliation, frequently shift their ideologies due to dissatisfaction with the government, country, and personal lives. They often attribute their misfortunes to immigrants, the international community, the wealthy, the educated, and those who look different. Every four years, they switch sides hoping the next president will improve their situation.
What puzzles me are the conservatives who voted for Ronald Reagan, H. Bush, W. Bush, John McCain, and Mitt Romney. Did they truly believe in their conservatism? If so, it's hard to understand their support for President Trump and his political ideology. Though I am an independent, I consider myself a Reagan-Bush conservative with a similar ideology. While I don't approve of every action or policy from Reagan or Bush, I support their broader concepts of free market, capitalism, globalization, spreading democracy and freedom, strong NATO, and solid alliances with traditional allies like Europe, Canada, Japan, and Australia. I also back W. Bush's immigration reform. These views today contradict MAGA ideology.
Most evangelical Christians did not endorse all the ideologies of Reagan or Bush but voted for the GOP due to their pro-life stance and the belief that character matters. However, the national GOP no longer advocates a pro-life position. In the 2024 GOP convention, the pro-life stance was removed, and the GOP has shown no interest in pursuing national abortion ban legislation. Yet, eighty percent of Evangelicals voted for President Trump in the 2024 election. You have to wonder if they truly believe in pro-life or have a different agenda.