Whether it is "bad" for a good Christian to join politics is subjective and depends on individual perspectives.
Christianity encourages its followers to engage with their communities, promote justice, and make positive changes in the world.
Many Christians believe that participating in politics is a way to have a positive impact on society, advocate for their values, and serve their fellow citizens.
In political roles, Christians can work towards promoting peace, equality, justice, and serving the common good.
However, politics can also be a challenging and morally complex field, often involving compromises, conflicting interests, and difficult decisions.
Some individuals argue that politics can be corrupting or may lead to compromises that contradict Christian principles. It is up to each individual to discern their own personal calling and convictions regarding political involvement, considering their faith, values, and the specific circumstances of the political landscape they are entering.
Ultimately, being involved in politics or any other profession does not make someone good or bad in the eyes of their faith. It is important for individuals to examine their intentions, actions, and how they live out their faith while in politics or any other vocation.