Better long-term outcomes can be achieved from decisions formed from a variety of opinions. You need to speak up if you think your team is missing something important, moving in the wrong direction, or taking too much risk. Dissent challenges groupthink, reminds those in the majority that there are alternatives, and encourages everyone to think outside the box. Those without formal power can use strategies to make sure their ideas are heard. Pass the in-group test if you show how you fit in. To pass the group threat test, you need to show how much you care for your team. It's important to make sure your message is tailored for different people, that you use objective information to address obstacles and risks, and that you encourage collaboration. It's time to get support. Dissent can be very worthwhile, even though it isn't easy.
It is difficult to be a Dissenter. You experience more pain when you question the beliefs. People will probably reject you from future interactions. Groups like consensus. They want to have their views verified, maintain a predictable environment, and work quickly towards their goals.