The point is that, I too was very much inspired by the Dhamma and wanted to spread it to many people. Apart from my parents, no one listened!
Some listened but tried to find mistakes in the Dhamma, some said “we will do it later, I am busy currently”, some started mocking and some generated hate. Then I was very much broken by such things.
Then I realised, if someone has the merits, he will find the true Dhamma just like we all have.
Yes we can teach them but only if we are at a very good level, otherwise frustration and agitation may start to ignite during such a debate and we may wrongly portray the Dhamma. Then the people will more and more mock the dhamma. As Christian said, people have a high and weird expectations of someone preaching spirituality. So it will become counterproductive.
The Buddha knows who can understand the Dhamma so that’s why it is easier for him. But unfortunately we can’t do that.
Thats why we should focus on ourselves first and if someone in the way shows some keen interest or asks you about these things , then you can tell him. That too should be done without any expectation of him suddenly following the Buddha Dhamma.