They had the Son of God standing in their midst, teaching them. Jesus forces himself on no one. And Jesus doesn't use miracles to force people to believe and trust in him. Saving faith, a living trust in Jesus Christ to rescue from sin and death, doesn't come from miracles. It comes from hearing the Word of Christ.
Faith comes by hearing.
The miracles, Jesus does when and where he pleases. And it isn't a matter of believing more so Jesus can do more. It's trusting Jesus even when there are no miracles, when He is despised and rejected, powerless and dead on a cross. Faith born of miracles needs miracles to feed it and keep it going. Faith born of Christ, needs nothing but Christ.