This statement is false. This is because generalising a ruling on the people that they are all disbelievers and secularists, is generalised takfeer, and refuge is sought from Allaah.
This is not permissible because among the people are those who are believers and those who are disbelievers and those who are hypocrites, so we cannot generalise the ruling upon them. It is not permissible at all to generalise a ruling upon the people and say the people are all muslims, this is not correct, or (to say) the people are all disbelievers, this is also not correct, or to say the people are all hypocrites.
This is evil speech; rather we say that amongst the people there are: believers, hypocrites and disbelievers.