Watching this from Canada... There are certain issues at play that some folks may downplay or not consider:
1. Immigration has greatly helped countries like Canada, the United States, France, the United Kingdom, Australia, Sweden, Belgium, and Germany develop, enrich themselves (just think of all the music, spectacles, markets and restaurants from different cultures), but it is not possible for those countries to receive all the migrants and asylum seekers in the world.
There is already so much, so much poverty in Canada, with some working families now resorting to food banks! So much homelessness with its lot of problems. And a huge increase in crime, esp. juvenile crime, despite all the recent societal calls to be respectful to others (signs in stores and subway stations, messages on public services phone lines, #MeToo, no harassment/discrimination/inappropriate conduct clauses on contracts, etc.). Car theft has exploded, arson has exploded, violence is escalating, dangerous poisonous drugs are circulating, etc. The premier of the province of Quebec has repeatedly let it be known that Quebec, though a welcoming land, just can't receive all those migrants and asylum seekers,! There are other Canadian provinces w/ far less people than Quebec and Ontario that won't receive all of them... And the USA, from what is reported, is facing very similar issues.
2. There must a be proper vetting system, esp. after the horrific wave of recent terrorism (from the Orlando Pulse nightclub [USA]—to the Bataclan [France]—to the Reina [Turkey]—to the Lindt Café [Australia]—to the Crocus City Hall [Russia], and so forth...). Barring entry to terrorists and extremists who may want to radicalize natives of their new country of residence. Education so newcomers abide by all laws and customs of their new home.
3. The overall economy is dwindling, and that's the TOP priority issue to many voters, esp. when some kids and adult can't properly be fed, there's a serious housing crisis, the cost of public transportation has more than quadrupled (in Quebec, it septupled) since the 80s, etc.
4. Too many wars going on in the world putting the entire planet at risk! Certain warmongering nations (like Iran) should NOT be enabled or funded.
5. COVID measures, though aimed at saving lives, actually cost many their lives, and some voters do not want a repeat of that.
6. Abortion regulations are left to each State to decide, and there will always be pro-lifers who do not want their tax money to fund it. Pro-lifers and pro-choicers should unite and work together to promote access to effective birth control, teach people about consent, etc.
All in all, there are many reasons why some voted Trump or Kamala. It is an oversimplication to assume that more than 76 million women and men of all ages and ethnicities who voted Trump are crazed White supremacists and bigots. That said, that Project 2025 thing is concerning and must never come to pass!