What is the main reason for all the hate and angry when the subject is politics?

It is a clash of values which means of morality. That always makes both sides angry.

The Bible tells us that “the whole world is lying in the power of the wicked one.” (1 John 5:19) The ruler of this world, Satan, is vicious and cruel. He is “misleading the entire inhabited earth.” (Revelation 12:9) Many people imitate him. And that’s just one reason why the world is so full of lies, hatred, and cruelty.

1) Zero accountability for politician's actions,

2) spiteful misuses of funds for personal gain,

3) outrageously overpriced public tenders for projects, and even more so the finalized versions of these projects,

4) exceptionally arrogant group of people claiming that all they do is for their subjects (oh hey there is the religious correlation!),

5) Politics is a job that requires the very best, yet being taken by one of if not the worst sort of people for it,

6) insidious network of exemptions and benefits, sometimes multiplying their already ridiculous pay

7) overstaffed, under performing, black hole of money is what politics is

8) just the sickening amount of times when you realize that they just have no idea what the hell department they are assigned to is about, have no real world experience in the field or management of this department yet are entirely responsible for it regardless. (ineptitude)

9) uncanny ability to find way to write in a loophole to even laws about (in example.:) cereals (yes that actually happened in my nation and now there is technically no limit to what they can be made out of)

10) just the sheer amount of brazen corruption

Because people must be right even when they are wrong.

Crazy extremist people

This go-round started with Mitch McConnell when he stated he wanted President to fail. Now that Trump is in he gets a chance to be Trump's and Putin's lap dog. It must be exhausting for him jumping from master to master.

Some people are just miserable people. Then politics is like religion, how you were raised and what you believe is right. Like arguing who has the right "God". It's an argument that never ends

Avoid asking questions about politics, avoid political discussion then.

Free masonic Hegellian Dialectic i.e. the divide and conquer agenda.