The context of this word about being judged by every idle word is quite interesting. About six months prior to the crucifixion the Jewish leaders came back and declared that they had judged that Jesus was not healing people by God but by the prince of the demons, Beelzebub. Which is the context of you saying that Trump's campaign is demonic. Jesus responded with His own judgment saying that they had committed a sin that would not be forgiven.
But many people when caught in pure slander like this will claim "I was just joking" or in your case "this is just my opinion". In response to that the Lord said that we would be held accountable for every idle word. The point being they were claiming "it didn't mean anything" to which Jesus said you will have to give account for every word you speak that "didn't mean anything".
The Lord also said that with what judgment you judge you shall be judged. For example, according to several sacred texts in Jewish history Cain died from the stones in his house falling down on him. He killed his brother with a stone so he also would be killed by the same weapon he used to kill others. That is simply an illustration of what the Lord confirms here.
But many people when caught in pure slander like this will claim "I was just joking" or in your case "this is just my opinion". In response to that the Lord said that we would be held accountable for every idle word. The point being they were claiming "it didn't mean anything" to which Jesus said you will have to give account for every word you speak that "didn't mean anything".
The Lord also said that with what judgment you judge you shall be judged. For example, according to several sacred texts in Jewish history Cain died from the stones in his house falling down on him. He killed his brother with a stone so he also would be killed by the same weapon he used to kill others. That is simply an illustration of what the Lord confirms here.